GMAT Question of the Day: Daily via email | Daily via Instagram New to GMAT Club? Watch this Video

 It is currently 27 Jan 2020, 05:14

### GMAT Club Daily Prep

#### Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

# In an attempt to explain the cause of malaria, a deadly infectious dis

Author Message
TAGS:

### Hide Tags

Manager
Joined: 22 Feb 2009
Posts: 150
In an attempt to explain the cause of malaria, a deadly infectious dis  [#permalink]

### Show Tags

Updated on: 04 Mar 2019, 04:14
6
13
00:00

Difficulty:

75% (hard)

Question Stats:

51% (01:48) correct 49% (01:55) wrong based on 574 sessions

### HideShow timer Statistics

In an attempt to explain the cause of malaria, a deadly infectious disease common in tropical areas, early european settlers in Hong Kong attributed the malady to poisonous gases supposedly emanating from low-lying swampland. Malaria, in fact, translates from the Italian as "bad air." In the 1880s, however, doctors determined that Anopheles mosquitoes were responsible for transmitting the disease to humans after observing that the female of the species can carry a parasitic protozoan that is passed on to unsuspecting humans when a mosquito feasts on a person's blood.

Which function does the statement in boldface fulfill with respect to the argument presented above?

(A) It provides support for the explanation of a particular phenomenon.

(B) It presents evidence which contradicts an established fact.

(C) It offers confirmation of a contested assumption.

(D) It identifies the cause of an erroneous conclusion.

(E) It proposes a new conclusion in place of an earlier conjecture.

Originally posted by vad3tha on 22 Jul 2014, 18:23.
Last edited by Bunuel on 04 Mar 2019, 04:14, edited 1 time in total.
Renamed the topic and edited the question.
Manager
Joined: 14 Dec 2011
Posts: 176
GPA: 3.46
WE: Information Technology (Consulting)
Re: In an attempt to explain the cause of malaria, a deadly infectious dis  [#permalink]

### Show Tags

22 Jul 2014, 20:57
1
1
Nice question. Without looking at the answers, we see that the bold face provides an evidence to support an alternative cause of malaria indicated by the lines "In the 1880s, however, doctors determined that Anopheles mosquitoes were responsible for transmitting the disease to humans"

Now we have A & B as the only contenders.

(B) It presents evidence which contradicts an established fact. -- From the premises -In an attempt to explain the cause of malaria, a deadly infectious disease common in tropical areas, early european settlers in Hong Kong attributed the malady to poisonous gases supposedly emanating from low-lying swampland. Malaria, in fact, translates from the Italian as "bad air." - We come to know that the possible attempt was made to explain the cause of malaria, so it doesn't really mean an established fact.

On the other hand,

(A) It (the female of the species can carry a parasitic protozoan that is passed on to unsuspecting humans when a mosquito feasts on a person's blood) provides support for the explanation of a particular phenomenon - "In the 1880s, however, doctors determined that Anopheles mosquitoes were responsible for transmitting the disease to humans"

That's why I too selected A as a final answer.
Manager
Joined: 22 Feb 2009
Posts: 150
Re: In an attempt to explain the cause of malaria, a deadly infectious dis  [#permalink]

### Show Tags

22 Jul 2014, 22:01
mba1382 wrote:
Nice question. Without looking at the answers, we see that the bold face provides an evidence to support an alternative cause of malaria indicated by the lines "In the 1880s, however, doctors determined that Anopheles mosquitoes were responsible for transmitting the disease to humans"

Now we have A & B as the only contenders.

(B) It presents evidence which contradicts an established fact. -- From the premises -In an attempt to explain the cause of malaria, a deadly infectious disease common in tropical areas, early european settlers in Hong Kong attributed the malady to poisonous gases supposedly emanating from low-lying swampland. Malaria, in fact, translates from the Italian as "bad air." - We come to know that the possible attempt was made to explain the cause of malaria, so it doesn't really mean an established fact.

On the other hand,

(A) It (the female of the species can carry a parasitic protozoan that is passed on to unsuspecting humans when a mosquito feasts on a person's blood) provides support for the explanation of a particular phenomenon - "In the 1880s, however, doctors determined that Anopheles mosquitoes were responsible for transmitting the disease to humans"

That's why I too selected A as a final answer.

Thanks. Could you explain why C is incorrect?
Manager
Joined: 14 Dec 2011
Posts: 176
GPA: 3.46
WE: Information Technology (Consulting)
Re: In an attempt to explain the cause of malaria, a deadly infectious dis  [#permalink]

### Show Tags

22 Jul 2014, 22:08
1
When I looked at option C- It offers confirmation of a contested assumption- I do not really see any assumption contested here. As in from the passage,I could not see whether we are trying to assume any alternative cause and then confirm the contested assumption. Moreover, the bold face acts as an evidence in support of the phenomenon- "In the 1880s, however, doctors determined that Anopheles mosquitoes were responsible for transmitting the disease to humans"

This is what I reasoned from C. May be an expert could throw more light.

mba1382 wrote:
Nice question. Without looking at the answers, we see that the bold face provides an evidence to support an alternative cause of malaria indicated by the lines "In the 1880s, however, doctors determined that Anopheles mosquitoes were responsible for transmitting the disease to humans"

Now we have A & B as the only contenders.

(B) It presents evidence which contradicts an established fact. -- From the premises -In an attempt to explain the cause of malaria, a deadly infectious disease common in tropical areas, early european settlers in Hong Kong attributed the malady to poisonous gases supposedly emanating from low-lying swampland. Malaria, in fact, translates from the Italian as "bad air." - We come to know that the possible attempt was made to explain the cause of malaria, so it doesn't really mean an established fact.

On the other hand,

(A) It (the female of the species can carry a parasitic protozoan that is passed on to unsuspecting humans when a mosquito feasts on a person's blood) provides support for the explanation of a particular phenomenon - "In the 1880s, however, doctors determined that Anopheles mosquitoes were responsible for transmitting the disease to humans"

That's why I too selected A as a final answer.

Thanks. Could you explain why C is incorrect?
Manager
Joined: 28 Apr 2014
Posts: 189
Re: In an attempt to explain the cause of malaria, a deadly infectious dis  [#permalink]

### Show Tags

22 Jul 2014, 23:48
why not E ? Isn't the fact contradicting the earlier conclusion around spread of Malaria
Manager
Joined: 22 Feb 2009
Posts: 150
Re: In an attempt to explain the cause of malaria, a deadly infectious dis  [#permalink]

### Show Tags

23 Jul 2014, 11:40
himanshujovi wrote:
why not E ? Isn't the fact contradicting the earlier conclusion around spread of Malaria

(E) It proposes a new conclusion in place of an earlier conjecture.

It cannot be E. The boldface is not a conclusion. It is a premise that supports the blue one. I hope it will help a little bit

In the 1880s, however, doctors determined that Anopheles mosquitoes were responsible for transmitting the disease to humans after observing that the female of the species can carry a parasitic protozoan that is passed on to unsuspecting humans when a mosquito feasts on a person's blood.
Manager
Joined: 12 Jan 2015
Posts: 185
Re: In an attempt to explain the cause of malaria, a deadly infectious dis  [#permalink]

### Show Tags

08 Feb 2016, 05:56
Hi chetan2u,

IMO- B.

OA--A
How could BF support for the explanation of a particular phenomenon. It depends which particular phenomena we are taking about

Is it the one described by European settlers in Hong Kong or the one described by doctors in 1880's.
I am more lean toward the one described by European settlers in Hong Kong
Hence I eliminated A.

Please assist whats wrong in my reasoning.
_________________
Thanks and Regards,
Prakhar
Current Student
Joined: 13 Jan 2014
Posts: 50
Concentration: Strategy, General Management
Schools: Tuck '19 (M\$)
GMAT 1: 660 Q44 V37
GMAT 2: 740 Q49 V41
GPA: 3.2
WE: Engineering (Manufacturing)
Re: In an attempt to explain the cause of malaria, a deadly infectious dis  [#permalink]

### Show Tags

08 Feb 2016, 06:14
Tough choice between A and C, but A IMO.

Here's my reasoning:

(B) It presents evidence that contradicts an established fact.
-This doesn't make sense at all...the scientists observation is supporting the theory about mosquitos, and nowhere does it say that the previous theory was a fact.

(C) It offers confirmation of a contested assumption.
-This is tempting, since the previous assumption about being transmitted by gas is being contested. However, the prompt doesn't mention that the observation was truly confirmed

(D) It identifies the cause of an erroneous conclusion.
-We have no reason to believe the theory about mosquitos is erroneous

(E) It proposes a new conclusion in place of an earlier conjecture.
-The conclusion is that the disease is transmitted via mosquitos, which isn't the boldface text

(A) It provides support for the explanation of a particular phenomenon.
-This is the answer that makes the most sense. The prompt is structured such that the conclusion is that malaria is transmitted by mosquitos and the bold face section provides evidence to support this in the form of an observed phenomenon.
_________________
Math Expert
Joined: 02 Aug 2009
Posts: 8331
Re: In an attempt to explain the cause of malaria, a deadly infectious dis  [#permalink]

### Show Tags

08 Feb 2016, 06:15
1
RAHKARP27071989 wrote:
Hi chetan2u,

IMO- B.

OA--A
How could BF support for the explanation of a particular phenomenon. It depends which particular phenomena we are taking about

Is it the one described by European settlers in Hong Kong or the one described by doctors in 1880's.
I am more lean toward the one described by European settlers in Hong Kong
Hence I eliminated A.

Please assist whats wrong in my reasoning.

lets divide the para into three portions as per the choice A and B..
1)Earlier thought process:-
early European settlers in Hong Kong attributed the malady to poisonous gases supposedly emanating from low-lying swampland.
2)now established from last 100 yrs or so:-
Anopheles mosquitoes were responsible for transmitting the disease to humans
3)observation on which the new theory is based
the female of the species can carry a parasitic protozoan that is passed on to unsuspecting humans when a mosquito feasts on a person's blood.

IF i see the three things, i can say that 1) the earlier thought pocess just gives a background to a disease but is not connected with the rest of para thereof..

now first lets see B..
(B) It presents evidence that contradicts an established fact.
the BF can be called as an evidence but it is used to support the established fact and not contradict..
the established fact is 2) .. so it should be eliminated..

now A
(A) It provides support for the explanation of a particular phenomenon.
the usage of after observing should help us in choosing this answer.. as seen above 3) is supporting 2)...
_________________
Intern
Joined: 01 Feb 2016
Posts: 8
Re: In an attempt to explain the cause of malaria, a deadly infectious dis  [#permalink]

### Show Tags

09 Feb 2016, 19:32
Hi Chetan2u, I understand that this is a "structure question" in the verbal section, hence the answer A. However, I don't find anything wrong in answer " Choice (D) It identifies the cause of an erroneous conclusion " since the bold sentence contextually is the cause of Malaria, and the erroneous conclusion refers to is the theory from European people. --Unless the erroneous conclusion isn't referring to European's theory?

Thanks in advance for explaining Kudos +:)
Math Expert
Joined: 02 Aug 2009
Posts: 8331
Re: In an attempt to explain the cause of malaria, a deadly infectious dis  [#permalink]

### Show Tags

09 Feb 2016, 20:52
1
Trainwithnolov3 wrote:
Hi Chetan2u, I understand that this is a "structure question" in the verbal section, hence the answer A. However, I don't find anything wrong in answer " Choice (D) It identifies the cause of an erroneous conclusion " since the bold sentence contextually is the cause of Malaria, and the erroneous conclusion refers to is the theory from European people. --Unless the erroneous conclusion isn't referring to European's theory?

Thanks in advance for explaining Kudos +:)

Hi Trainwithnolov3,

in the para,..

Quote:
In an attempt to explain the cause of malaria, a deadly infectious disease, early European settlers in Hong Kong attributed the malady to poisonous gases supposedly emanating from low-lying swampland.

this acts as a premise/statement/fact, that holds true on the thinking of early european settlers. Its not a CONCLUSION..

Quote:
In the 1880s, however, doctors determined that Anopheles mosquitoes were responsible for transmitting the disease to humans

HOWEVER generally points towards a counter point/ counter premise indicator.
Since there is no conclusion indicators, this can be taken at the best as a conclusion ..

Quote:
after observing that the female of the species can carry a parasitic protozoan that is passed on to unsuspecting humans when a mosquito feasts on a person's blood.

As can be seen by the word observing, its an observation in support of counter premise/conclusion..
It can also be said as a negating factor for some earlier believed theory.
but not as "It identifies the cause of an erroneous conclusion"..
_________________
Intern
Joined: 01 Jul 2014
Posts: 25
Location: India
GMAT 1: 710 Q50 V36
GPA: 3.2
Re: In an attempt to explain the cause of malaria, a deadly infectious dis  [#permalink]

### Show Tags

12 Oct 2016, 11:54
Bold Face (BF) - the female of the species can carry a parasitic protozoan that is passed on to unsuspecting humans when a mosquito feasts on a person's blood
Conclusion - Anopheles mosquitoes were responsible for transmitting the disease to humans

The Bold Face part supports the conclusion.

We need to find the answer choice that indicates answer choice to be some kind of premise.

(A) It provides support for the explanation of a particular phenomenon. -->Correct: Answer choice on the lines of our pre-thinking i.e BF supports the conclusion"
(B) It presents evidence which contradicts an established fact. -->Wrong: BF definitely presents evidence and that too contradicts what early European settlers thought, but was that an established fact? Argument does not say it was an established fact.
(C) It offers confirmation of a contested assumption. --> Wrong: Nothing contested
(D) It identifies the cause of an erroneous conclusion. --> Wrong: BF support the conclusion, conclusion is not erroneous
(E) It proposes a new conclusion in place of an earlier conjecture. --> Wrong: BF is evidence support the conclusion
Non-Human User
Joined: 01 Oct 2013
Posts: 8116
Re: In an attempt to explain the cause of malaria, a deadly infectious dis  [#permalink]

### Show Tags

04 Mar 2019, 04:14
Hello from the GMAT Club VerbalBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
Re: In an attempt to explain the cause of malaria, a deadly infectious dis   [#permalink] 04 Mar 2019, 04:14
Display posts from previous: Sort by