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12 Days of Christmas GMAT Competition - Day 5: Researcher: Though leec

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12 Days of Christmas GMAT Competition - Day 5: Researcher: Though leec [#permalink] New post   18 Dec 2021, 07:00
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12 Days of Christmas GMAT Competition with Lots of Fun

Researcher: Though leeches were once widely used in ancient medicine to suck blood from the human patient in an attempt to cure disease, this practice has largely been abandoned by modern medicine. However, leech saliva contains proteins that help to reduce inflammation and the incidence of blood clotting, as well as to widen constricted blood vessels. Since these qualities are associated with increased circulation, leech saliva can be beneficial to the success of skin graft procedures, which require continually stimulated circulation to promote successful attachment of the graft.

In the argument given, the two portions in boldface play which of the following roles?


(A) The first is a claim that is unsupported by additional evidence; the second refutes the validity of that claim.

(B) The first is a position taken by the researcher against a claim defended by others; the second is support for that position.

(C) The first is evidence that has been used to support an assertion that the researcher challenges; the second is that assertion.

(D) The first is evidence that has been used to support an assertion that the researcher challenges; the second is the researcher’s assertion.

(E) The first is evidence that has been used to support the researcher’s assertion; the second is also evidence used to support that same assertion.



 


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Re: 12 Days of Christmas GMAT Competition - Day 5: Researcher: Though leec [#permalink] New post   19 Dec 2021, 08:00
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Bunuel wrote:
12 Days of Christmas GMAT Competition with Lots of Fun

Researcher: Though leeches were once widely used in ancient medicine to suck blood from the human patient in an attempt to cure disease, this practice has largely been abandoned by modern medicine. However, leech saliva contains proteins that help to reduce inflammation and the incidence of blood clotting, as well as to widen constricted blood vessels. Since these qualities are associated with increased circulation, leech saliva can be beneficial to the success of skin graft procedures, which require continually stimulated circulation to promote successful attachment of the graft.

In the argument given, the two portions in boldface play which of the following roles?


(A) The first is a claim that is unsupported by additional evidence; the second refutes the validity of that claim.

(B) The first is a position taken by the researcher against a claim defended by others; the second is support for that position.

(C) The first is evidence that has been used to support an assertion that the researcher challenges; the second is that assertion.

(D) The first is evidence that has been used to support an assertion that the researcher challenges; the second is the researcher’s assertion.

(E) The first is evidence that has been used to support the researcher’s assertion; the second is also evidence used to support that same assertion.






Manhattan Prep Official Explanation

Step 1: Identify the Question

The boldface statements in the question stem indicate that this is a Describe the Role (aka, Boldface) question.

Step 2: Deconstruct the Argument

A researcher is making an argument. The argument is a little jumbled, so rearrange it to put the conclusion at the end:

A long time ago, leeches were commonly used in medicine, although this mostly doesn’t happen today. But (first boldface) leech saliva actually does have certain medical properties. Those properties can increase circulation and (second boldface, at the end of the argument) skin grafts need increased circulation in order to heal successfully. So, the researcher concludes, leech saliva can be helpful for skin grafts.

Step 3: Pause and State the Goal

On Describe the Role questions, your task is to articulate what role or purpose each boldface plays in the broader argument. It’s useful to first identify the author’s conclusion and then articulate how each boldface relates to that conclusion. In this case, the researcher makes a claim that leech saliva can help skin graft procedures to succeed. The first boldface provides a fact (that leech saliva has certain properties) to support that claim. The second boldface provides another fact (that skin grafts need good circulation to heal) to support that claim.

Step 4: Work From Wrong to Right

(A) The first boldface is a fact, not a claim, though it’s true that this fact isn’t supported by its own evidence. But the real issue is that the second boldface does not refute the first one. Rather, the two boldface statements both support the researcher’s conclusion.

(B) The first boldface is stated by the researcher, but it isn’t stated to refute something that someone else says, nor is the first boldface a “position” (a claim or conclusion). It’s just a fact. The second boldface does not support the first boldface (the words that position refer back to the first is a position language in the early part of this choice). Rather, both boldface statements support the researcher’s conclusion (which is not in boldface).

(C) The first part of this choice is fine right up until the word challenges. The first boldface supports the researcher’s argument; it does not challenge that argument. The second boldface is not a conclusion that the researcher challenges; rather, the second boldface is support for the researcher’s conclusion.

(D) The first part of this choice is fine right up until the word challenges. The first boldface supports the researcher’s argument; it does not challenge that argument. The second boldface is not the researcher’s assertion, or conclusion. Rather, the second boldface is support for the researcher’s conclusion.

(E) CORRECT. The first and second boldfaces are both evidence used by the researcher to support the conclusion.
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Re: 12 Days of Christmas GMAT Competition - Day 5: Researcher: Though leec [#permalink] New post   18 Dec 2021, 07:17
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In the argument given, the two portions in boldface play which of the following roles?


(A) The first is a claim that is unsupported by additional evidence; the second refutes the validity of that claim. the second does not refute

(B) The first is a position taken by the researcher against a claim defended by others; the second is support for that position. no one else's view was mentioned

(C) The first is evidence that has been used to support an assertion that the researcher challenges; the second is that assertion. the author does not challenge anything

(D) The first is evidence that has been used to support an assertion that the researcher challenges; the second is the researcher’s assertion. the author does not challenge anything

(E) The first is evidence that has been used to support the researcher’s assertion; the second is also evidence used to support that same assertion. correct
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Re: 12 Days of Christmas GMAT Competition - Day 5: Researcher: Though leec [#permalink] New post   18 Dec 2021, 07:19
Researcher: Though leeches were once widely used in ancient medicine to suck blood from the human patient in an attempt to cure disease, this practice has largely been abandoned by modern medicine. However, leech saliva contains proteins that help to reduce inflammation and the incidence of blood clotting, as well as to widen constricted blood vessels. Since these qualities are associated with increased circulation, leech saliva can be beneficial to the success of skin graft procedures, which require continually stimulated circulation to promote successful attachment of the graft.

In the argument given, the two portions in boldface play which of the following roles?


(A) The first is a claim that is unsupported by additional evidence; the second refutes the validity of that claim.Then Researcher go and expand the Counter premise and provide example of where leeches can be used.


(B) The first is a position taken by the researcher against a claim defended by others; the second is support for that position.

(C) The first is evidence that has been used to support an assertion that the researcher challenges; the second is that assertion.

(D) The first is evidence that has been used to support an assertion that the researcher challenges; the second is the researcher’s assertion.

(E) The first is evidence that has been used to support the researcher’s assertion; the second is also evidence used to support that same assertion.

Let's understand the argument -
Researcher presents a premise that Leeches has been abandoned by modern medicine, then researcher present a counter premise then

Now bold faces play roles of Researcher's assertion and the second boldface present further evidence to support it .
Only E option is similar
Answer E
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Re: 12 Days of Christmas GMAT Competition - Day 5: Researcher: Though leec [#permalink] New post   18 Dec 2021, 07:21
Bunuel wrote:
12 Days of Christmas GMAT Competition with Lots of Fun

Researcher: Though leeches were once widely used in ancient medicine to suck blood from the human patient in an attempt to cure disease, this practice has largely been abandoned by modern medicine. However, leech saliva contains proteins that help to reduce inflammation and the incidence of blood clotting, as well as to widen constricted blood vessels. Since these qualities are associated with increased circulation, leech saliva can be beneficial to the success of skin graft procedures, which require continually stimulated circulation to promote successful attachment of the graft.

In the argument given, the two portions in boldface play which of the following roles?


(A) The first is a claim that is unsupported by additional evidence; the second refutes the validity of that claim.

(B) The first is a position taken by the researcher against a claim defended by others; the second is support for that position.

(C) The first is evidence that has been used to support an assertion that the researcher challenges; the second is that assertion.

(D) The first is evidence that has been used to support an assertion that the researcher challenges; the second is the researcher’s assertion.

(E) The first is evidence that has been used to support the researcher’s assertion; the second is also evidence used to support that same assertion.






 


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Both are on the same side
First statement is not a claim because of however marker
Option E looks Fine to me
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Re: 12 Days of Christmas GMAT Competition - Day 5: Researcher: Though leec [#permalink] New post   18 Dec 2021, 07:32
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Researcher: Though leeches were once widely used in ancient medicine to suck blood from the human patient in an attempt to cure disease, this practice has largely been abandoned by modern medicine. However, leech saliva contains proteins that help to reduce inflammation and the incidence of blood clotting, as well as to widen constricted blood vessels. Since these qualities are associated with increased circulation, leech saliva can be beneficial to the success of skin graft procedures, which require continually stimulated circulation to promote successful attachment of the graft.

In the argument given, the two portions in boldface play which of the following roles?


(A) The first is a claim that is unsupported by additional evidence; the second refutes the validity of that claim.
First is not a claim; Second does not refute that claim

(B) The first is a position taken by the researcher against a claim defended by others; the second is support for that position.
First is evidence or fact not a position

(C) The first is evidence that has been used to support an assertion that the researcher challenges; the second is that assertion.
Researcher does not challenge the assertion rather his assertion is supported with evidences

(D) The first is evidence that has been used to support an assertion that the researcher challenges; the second is the researcher’s assertion.
Researcher does not challenge the assertion rather his assertion is supported with evidences

(E) The first is evidence that has been used to support the researcher’s assertion; the second is also evidence used to support that same assertion.
Correct choice


(E) is correct IMO
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Re: 12 Days of Christmas GMAT Competition - Day 5: Researcher: Though leec [#permalink] New post   18 Dec 2021, 07:37
The answer to this question must be E

"The first is evidence that has been used to support the researcher’s assertion; the second is also evidence used to support that same assertion"

Researcher assertion - " leech saliva can be beneficial to the success of skin graft procedures"

So according to me answer is E
Thanks
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Re: 12 Days of Christmas GMAT Competition - Day 5: Researcher: Though leec [#permalink] New post   18 Dec 2021, 07:41
Boldface questions are easy until they aren't. You have to understand the roles played by each fragment of the stimulus before you head to the argument.

BF1: This statement clearly is a premise that acts as the foundation of the researcher's conclusion. Understanding this alone helps us eliminate options B, C and D.

BF2: It is another premise that helps us strengthen BF1, which in turn strengthens the conclusion. Understanding this helps us eliminate option A.

Option E is the answer.
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Re: 12 Days of Christmas GMAT Competition - Day 5: Researcher: Though leec [#permalink] New post   18 Dec 2021, 07:46
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Researcher: Though leeches were once widely used in ancient medicine to suck blood from the human patient in an attempt to cure disease, this practice has largely been abandoned by modern medicine. However, leech saliva contains proteins that help to reduce inflammation and the incidence of blood clotting, as well as to widen constricted blood vessels. Since these qualities are associated with increased circulation, leech saliva can be beneficial to the success of skin graft procedures, which require continually stimulated circulation to promote successful attachment of the graft.

In the argument given, the two portions in boldface play which of the following roles?


(A) The first is a claim that is unsupported by additional evidence; the second refutes the validity of that claim.
first is not claim

(B) The first is a position taken by the researcher against a claim defended by others; the second is support for that position.
First is not a position

(C) The first is evidence that has been used to support an assertion that the researcher challenges; the second is that assertion.
Researcher did not challenge any assertion

(D) The first is evidence that has been used to support an assertion that the researcher challenges; the second is the researcher’s assertion.
Researcher did not challenge any assertion

(E) The first is evidence that has been used to support the researcher’s assertion; the second is also evidence used to support that same assertion.
Correct choice
(E) is correct
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Re: 12 Days of Christmas GMAT Competition - Day 5: Researcher: Though leec [#permalink] New post   18 Dec 2021, 07:48
(A) The first is a claim that is unsupported by additional evidence; the second refutes the validity of that claim.
---> second does not refute anything
(B) The first is a position taken by the researcher against a claim defended by others; the second is support for that position.
---> no second party claims against the researcher
(C) The first is evidence that has been used to support an assertion that the researcher challenges; the second is that assertion.
---> researcher uses the first part to come to the conclusion
(D) The first is evidence that has been used to support an assertion that the researcher challenges; the second is the researcher’s assertion.
---> same as C
(E) The first is evidence that has been used to support the researcher’s assertion; the second is also evidence used to support that same assertion.
---> correct
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Re: 12 Days of Christmas GMAT Competition - Day 5: Researcher: Though leec [#permalink] New post   18 Dec 2021, 07:49
The conclusion of the argument is - leech saliva can be beneficial to the success of skin graft procedures

The first bold face supports the conclusion.
The second bold face also supports the conclusion as it states that successful attachment of graft requires continuous stimulation of blood.

(A) The first is a claim that is unsupported by additional evidence; the second refutes the validity of that claim.

The author doesn't refute the validity that leech saliva has medical benefits.

(B)The first is a position taken by the researcher against a claim defended by others; the second is support for that position.

The author supports that leech saliva has medical benefits.

(C) The first is evidence that has been used to support an assertion that the researcher challenges; the second is that assertion.

The researcher is not challenging the assertion. He / She is merely stating making a statement.

(D) The first is evidence that has been used to support an assertion that the researcher challenges; the second is the researcher’s assertion.

The researcher is not challenging the assertion. He / She is merely stating making a statement.

(E) The first is evidence that has been used to support the researcher’s assertion; the second is also evidence used to support that same assertion.

The first evidence supports that leech saliva can be beneficial as saliva contains proteins that help to reduce inflammation and the incidence of blood clotting, the second assertion also supports stating that a successful skin graft requires continuous stimulated circulation to promote successful attachment of the graft.

IMO - E
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Re: 12 Days of Christmas GMAT Competition - Day 5: Researcher: Though leec [#permalink] New post   18 Dec 2021, 07:49
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Argument :
leeches were once widely used in ancient medicine to suck blood from the human patient in an attempt to cure disease, this practice has largely been abandoned by modern medicine

BF1 b]leech saliva contains proteins that help to reduce inflammation and the incidence of blood clotting, as well as to widen constricted blood vessels[/b]

BF2 : which require continually stimulated circulation to promote successful attachment of the graft.

(A) The first is a claim that is unsupported by additional evidence; the second refutes the validity of that claim. BF2 is not refuting BF1

(B) The first is a position taken by the researcher against a claim defended by others; the second is support for that position.
 BF1 is not position taken by researcher its a fact stated..


(C) The first is evidence that has been used to support an assertion that the researcher challenges; the second is that assertion.
no challenge given in the argument

(D) The first is evidence that has been used to support an assertion that the researcher challenges; the second is the researcher’s assertion. no challenge given in the argument

(E) The first is evidence that has been used to support the researcher’s assertion; the second is also evidence used to support that same assertion.
this is true and valid as per the given argument.

OPTION E is correct

Bunuel wrote:
12 Days of Christmas GMAT Competition with Lots of Fun

Researcher: Though leeches were once widely used in ancient medicine to suck blood from the human patient in an attempt to cure disease, this practice has largely been abandoned by modern medicine. However, leech saliva contains proteins that help to reduce inflammation and the incidence of blood clotting, as well as to widen constricted blood vessels. Since these qualities are associated with increased circulation, leech saliva can be beneficial to the success of skin graft procedures, which require continually stimulated circulation to promote successful attachment of the graft.

In the argument given, the two portions in boldface play which of the following roles?


(A) The first is a claim that is unsupported by additional evidence; the second refutes the validity of that claim.

(B) The first is a position taken by the researcher against a claim defended by others; the second is support for that position.

(C) The first is evidence that has been used to support an assertion that the researcher challenges; the second is that assertion.

(D) The first is evidence that has been used to support an assertion that the researcher challenges; the second is the researcher’s assertion.

(E) The first is evidence that has been used to support the researcher’s assertion; the second is also evidence used to support that same assertion.






 


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Re: 12 Days of Christmas GMAT Competition - Day 5: Researcher: Though leec [#permalink] New post   18 Dec 2021, 07:49
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The answer should be E.
(A) The first is a claim that is unsupported by additional evidence; the second refutes the validity of that claim.
Incorrect: The first is not a claim but evidence and hence incorrect

(B) The first is a position taken by the researcher against a claim defended by others; the second is support for that position.
Incorrect: The first is not a position but evidence and hence incorrect

(C) The first is evidence that has been used to support an assertion that the researcher challenges; the second is that assertion.
Incorrect: The first is evidence which researcher has used to support but not challenge

(D) The first is evidence that has been used to support an assertion that the researcher challenges; the second is the researcher’s assertion.
Incorrect: The first is evidence which researcher has used to support but not challenge

(E) The first is evidence that has been used to support the researcher’s assertion; the second is also evidence used to support that same assertion.
Correct: The first is evidence used to support the researcher's assertion and the second is also evidence used to support the same assertion.
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Re: 12 Days of Christmas GMAT Competition - Day 5: Researcher: Though leec [#permalink] New post   18 Dec 2021, 07:51
Bunuel wrote:
12 Days of Christmas GMAT Competition with Lots of Fun

Researcher: Though leeches were once widely used in ancient medicine to suck blood from the human patient in an attempt to cure disease, this practice has largely been abandoned by modern medicine. However, leech saliva contains proteins that help to reduce inflammation and the incidence of blood clotting, as well as to widen constricted blood vessels. Since these qualities are associated with increased circulation, leech saliva can be beneficial to the success of skin graft procedures, which require continually stimulated circulation to promote successful attachment of the graft.

In the argument given, the two portions in boldface play which of the following roles?


(A) The first is a claim that is unsupported by additional evidence; the second refutes the validity of that claim.

(B) The first is a position taken by the researcher against a claim defended by others; the second is support for that position.

(C) The first is evidence that has been used to support an assertion that the researcher challenges; the second is that assertion.

(D) The first is evidence that has been used to support an assertion that the researcher challenges; the second is the researcher’s assertion.

(E) The first is evidence that has been used to support the researcher’s assertion; the second is also evidence used to support that same assertion.






 


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for the 12 Days of Christmas Competition

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(A) The first is a claim that is unsupported by additional evidence; the second refutes the validity of that claim.
The second doesn't refute the validity it supports.

(B) The first is a position taken by the researcher against a claim defended by others; the second is support for that position.
This is right.

(C) The first is evidence that has been used to support an assertion that the researcher challenges; the second is that assertion.
The bold part makes it wrong.

(D) The first is evidence that has been used to support an assertion that the researcher challenges; the second is the researcher’s assertion.
Same as C

(E) The first is evidence that has been used to support the researcher’s assertion; the second is also evidence used to support that same assertion.
There is no statement that suggests it's evidence.
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Re: 12 Days of Christmas GMAT Competition - Day 5: Researcher: Though leec [#permalink] New post   18 Dec 2021, 08:02
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Bunuel wrote:
12 Days of Christmas GMAT Competition with Lots of Fun

Researcher: Though leeches were once widely used in ancient medicine to suck blood from the human patient in an attempt to cure disease, this practice has largely been abandoned by modern medicine. However, leech saliva contains proteins that help to reduce inflammation and the incidence of blood clotting, as well as to widen constricted blood vessels. Since these qualities are associated with increased circulation, leech saliva can be beneficial to the success of skin graft procedures, which require continually stimulated circulation to promote successful attachment of the graft.

In the argument given, the two portions in boldface play which of the following roles?


(A) The first is a claim that is unsupported by additional evidence; the second refutes the validity of that claim.

(B) The first is a position taken by the researcher against a claim defended by others; the second is support for that position.

(C) The first is evidence that has been used to support an assertion that the researcher challenges; the second is that assertion.

(D) The first is evidence that has been used to support an assertion that the researcher challenges; the second is the researcher’s assertion.

(E) The first is evidence that has been used to support the researcher’s assertion; the second is also evidence used to support that same assertion.






 


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I feel the answer is E

(A) The first is a claim that is unsupported by additional evidence; the second refutes the validity of that claim. First is not a claim and the second does not refute anything

(B) The first is a position taken by the researcher against a claim defended by others; the second is support for that position. Nobody is defending anything here

(C) The first is evidence that has been used to support an assertion that the researcher challenges; the second is that assertion. Researcher is not challenging anything

(D) The first is evidence that has been used to support an assertion that the researcher challenges; the second is the researcher’s assertion. Researcher is not challenging anything

(E) The first is evidence that has been used to support the researcher’s assertion; the second is also evidence used to support that same assertion. CORRECT
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Re: 12 Days of Christmas GMAT Competition - Day 5: Researcher: Though leec [#permalink] New post   18 Dec 2021, 08:06
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Let's deconstruct the argument:


The first statement "though the leeches .........................by modern medicine" is a fact.
The second statement "however, leech saliva .......................................blood vessels" is a fact from the researcher's perspective.
Third Statement is an assertion based on the second statement: Since these qualities are associated with increased circulation, leech saliva can be beneficial to the success of skin graft procedures
And the last is again evidence or fact which requires continually stimulated circulation to promote successful attachment of the graft.

(A) The first is a claim that is unsupported by additional evidence; the second refutes the validity of that claim.............................The first and second are not opposing each other. In fact, both are supporting an assertion made by the researcher. reject it.

(B) The first is a position taken by the researcher against a claim defended by others; the second is support for that position........................First is not a position. Moreover, the argument is not making any claim against the properties of lecches' saliva.

(C) The first is evidence that has been used to support an assertion that the researcher challenges; the second is that assertion.........................................The second is not the assertion, it's evidence that supports the assertion. Reject it.

(D) The first is evidence that has been used to support an assertion that the researcher challenges; the second is the researcher’s assertion..........................The second is not the main assertion. It is supporting the assertion made by the researcher.

(E) The first is evidence that has been used to support the researcher’s assertion; the second is also evidence used to support that same assertion..........................This looks fine. Both the boldface support the assertion.


IMO OA should be E.
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Re: 12 Days of Christmas GMAT Competition - Day 5: Researcher: Though leec [#permalink] New post   18 Dec 2021, 08:09
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Bunuel wrote:
Researcher: Though leeches were once widely used in ancient medicine to suck blood from the human patient in an attempt to cure disease, this practice has largely been abandoned by modern medicine. However, leech saliva contains proteins that help to reduce inflammation and the incidence of blood clotting, as well as to widen constricted blood vessels. Since these qualities are associated with increased circulation, leech saliva can be beneficial to the success of skin graft procedures, which require continually stimulated circulation to promote successful attachment of the graft.

In the argument given, the two portions in boldface play which of the following roles?
(A) The first is a claim that is unsupported by additional evidence; the second refutes the validity of that claim.

(B) The first is a position taken by the researcher against a claim defended by others; the second is support for that position.

(C) The first is evidence that has been used to support an assertion that the researcher challenges; the second is that assertion.

(D) The first is evidence that has been used to support an assertion that the researcher challenges; the second is the researcher’s assertion.

(E) The first is evidence that has been used to support the researcher’s assertion; the second is also evidence used to support that same assertion.

Checking the question stem, we know we need to find the function of the two bolded portions of the passage.

Scanning the passage, we can map out the functions of each line: sentence 1 contains a position held by the medical community broadly, sentence 2 (bolded) contains some evidence which is in contrast to that position, sentence 3's first clause contains the researcher's assertion, and sentence 3's second clause (bolded) contains some more evidence supporting the researcher's assertion.

Let's review the answer choices:
A: The first is not a claim; it is evidence. The second doesn't refute a claim; it provides evidence for the researcher's assertion. Eliminate A.
B: The first is not a position taken; it is evidence. Eliminate B.
C: The first is not evidence in support of an assertion the researcher challenges; it supports the assertion of the researcher. The second is not an assertion; it is evidence. Eliminate C.
D: The first is not evidence in support of an assertion the researcher challenges; it supports the assertion of the researcher. The second is not an assertion; it is evidence. Eliminate D.
E: The descriptions of E are accurate.

The correct answer is E.
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Re: 12 Days of Christmas GMAT Competition - Day 5: Researcher: Though leec [#permalink] New post   18 Dec 2021, 08:12
The conclusion or assertion of the author is "Since these qualities are associated with increased circulation, leech saliva can be beneficial to the success of skin graft procedures". To support this assertion, the author uses two evidences 1. benefits of leech saliva 2. why leech saliva will be beneficial in the graft procedure

So, answer is E.
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Re: 12 Days of Christmas GMAT Competition - Day 5: Researcher: Though leec [#permalink] New post   18 Dec 2021, 08:16
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Researcher: Though leeches were once widely used in ancient medicine to suck blood from the human patient in an attempt to cure disease, this practice has largely been abandoned by modern medicine. However, leech saliva contains proteins that help to reduce inflammation and the incidence of blood clotting, as well as to widen constricted blood vessels. Since these qualities are associated with increased circulation, leech saliva can be beneficial to the success of skin graft procedures, which require continually stimulated circulation to promote successful attachment of the graft.

In the argument given, the two portions in boldface play which of the following roles?

Analysis-
BF1 - leech saliva contains proteins that help to reduce inflammation and the incidence of blood clotting, as well as to widen constricted blood vessels.
BF2 - which require continually stimulated circulation to promote successful attachment of the graft

Researcher's assertion - leech saliva can be beneficial to the success of skin graft procedures
Both BF1 and BF2 are supporting this researcher's assertion

(A) The first is a claim that is unsupported by additional evidence; the second refutes the validity of that claim.
Incorrect. Both BF1 and BF2 are supporting this researcher's assertion.

(B) The first is a position taken by the researcher against a claim defended by others; the second is support for that position.
Incorrect. The first is evidence and not position taken by the researcher against claim defended by others.

(C) The first is evidence that has been used to support an assertion that the researcher challenges; the second is that assertion.
Incorrect. The researcher's assertion is that leech saliva can be beneficial to the success of skin graft procedures.

(D) The first is evidence that has been used to support an assertion that the researcher challenges; the second is the researcher’s assertion.
Incorrect. The researcher's assertion is that leech saliva can be beneficial to the success of skin graft procedures.

(E) The first is evidence that has been used to support the researcher’s assertion; the second is also evidence used to support that same assertion.
Correct. Both BF1 and BF2 are supporting the researcher's assertion that leech saliva can be beneficial to the success of skin graft procedures.
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Re: 12 Days of Christmas GMAT Competition - Day 5: Researcher: Though leec [#permalink] New post   18 Dec 2021, 08:28
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(A) The first is a claim that is unsupported by additional evidence; the second refutes the validity of that claim.----->>Second part is not refuting the validity

(B) The first is a position taken by the researcher against a claim defended by others; the second is support for that position.--here defended by others is wrong

(C) The first is evidence that has been used to support an assertion that the researcher challenges; the second is that assertion.--researcher is not challenging the assertion (second part )

(D) The first is evidence that has been used to support an assertion that the researcher challenges; the second is the researcher’s assertion.-same issue as c

(E) The first is evidence that has been used to support the researcher’s assertion; the second is also evidence used to support that same assertion. correct both boldface is supporting the researcher's assertion that leaches can be beneficial

OA :E
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Re: 12 Days of Christmas GMAT Competition - Day 5: Researcher: Though leec [#permalink]
18 Dec 2021, 08:28
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