A newly discovered disease is thought to be caused by a : GMAT Critical Reasoning (CR)
Check GMAT Club Decision Tracker for the Latest School Decision Releases https://gmatclub.com/AppTrack

 It is currently 23 Feb 2017, 02:12

### 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

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# A newly discovered disease is thought to be caused by a

Author Message
TAGS:

### Hide Tags

Intern
Joined: 16 Feb 2010
Posts: 28
Followers: 0

Kudos [?]: 9 [0], given: 0

A newly discovered disease is thought to be caused by a [#permalink]

### Show Tags

23 Apr 2010, 14:50
00:00

Difficulty:

(N/A)

Question Stats:

48% (01:58) correct 52% (01:20) wrong based on 84 sessions

### HideShow timer Statistics

A newly discovered disease is thought to be caused by a certain bacterium. However, recently released data notes that the bacterium thrives(prosper) in the presence of a certain virus, implying that it is actually the virus that causes the new disease.
Which of the following pieces of evidence would most support the data’s implication?
(A) In the absence of the virus, the disease has been observed to follow infection by the bacterium.
(B) The virus has been shown to aid the growth of bacterium, a process which often leads to the onset of the disease.
(C) The virus alone has been observed in many cases of the disease.
(D) In cases where the disease does not develop, infection by the bacterium is usually preceded by infection by the virus.
(E) Onset of the disease usually follows infection by both the virus and the bacterium.

If you have any questions
New!
Veritas Prep GMAT Instructor
Joined: 16 Oct 2010
Posts: 7184
Location: Pune, India
Followers: 2166

Kudos [?]: 14011 [2] , given: 222

### Show Tags

18 Nov 2010, 06:52
2
KUDOS
Expert's post
poohv005 wrote:
A newly discovered disease is thought to be caused by a certain bacterium. However, recently released data notes that the bacterium thrives(prosper) in the presence of a certain virus, implying that it is actually the virus that causes the new disease.
Which of the following pieces of evidence would most support the data’s implication?
(A) In the absence of the virus, the disease has been observed to follow infection by the bacterium.
(B) The virus has been shown to aid the growth of bacterium, a process which often leads to the onset of the disease.
(C) The virus alone has been observed in many cases of the disease.
(D) In cases where the disease does not develop, infection by the bacterium is usually preceded by infection by the virus.
(E) Onset of the disease usually follows infection by both the virus and the bacterium.

Let's focus on the question first because that is all that is relevant to us. (In fact, it helps to read the question first so that you can read the argument with the question in perspective)
Which of the following pieces of evidence would most support the data’s implication?

Now, before we move on, what is data's implication?
implying that it is actually the virus that causes the new disease.

Now you have to pick an answer choice which best supports 'it is actually the virus that causes the disease'. Focus on that.

Option (C) clearly states that the virus alone has been found in many cases. Then it must be the virus that causes the disease.
It does not conflict with the premise above - 'A newly discovered disease is thought to be caused by a certain bacterium.' The premise does not say that it is caused by the bacterium. It only says that it is thought to be caused by the bacterium.

Option (B) doesn't strengthen that it is actually the virus that causes the disease. It says that the virus aids the growth of bacterium and this growth leads to development of the disease. The cause of the disease is still the bacterium. That is, if the bacterium weren't present, the virus probably couldn't do anything alone. (Note the probably here. This statement doesn't say that the virus alone cannot do anything but it also doesn't say that the virus alone can cause the disease) But we want to strengthen that it is actually the virus which is the cause.
_________________

Karishma
Veritas Prep | GMAT Instructor
My Blog

Get started with Veritas Prep GMAT On Demand for $199 Veritas Prep Reviews Veritas Prep GMAT Instructor Joined: 16 Oct 2010 Posts: 7184 Location: Pune, India Followers: 2166 Kudos [?]: 14011 [1] , given: 222 Re: A newly discovered disease is thought to be caused by a [#permalink] ### Show Tags 17 May 2016, 01:39 1 This post received KUDOS Expert's post rohitt911 wrote: I marked B, because i thought it says the GROWTH of bacterium causes the disease and not only the bacterium. And the growth of bacterium is because of the virus, hence the virus causes the disease. What is data's implication? It is actually the virus that causes the new disease. Now you have to pick an answer choice which best supports 'it is actually the virus that causes the disease'. Focus on that. Option (B) doesn't strengthen that it is actually the virus that causes the disease. It says that the virus aids the growth of bacterium and this growth leads to development of the disease. The cause of the disease is still the bacterium. That is, if the bacterium weren't present, the virus probably couldn't do anything alone. (Note the probably here. This statement doesn't say that the virus alone cannot do anything but it also doesn't say that the virus alone can cause the disease) But we want to strengthen that it is actually the virus which is the cause. _________________ Karishma Veritas Prep | GMAT Instructor My Blog Get started with Veritas Prep GMAT On Demand for$199

Veritas Prep Reviews

Manager
Joined: 29 Oct 2009
Posts: 201
Concentration: General Management, Sustainability
WE: Consulting (Computer Software)
Followers: 2

Kudos [?]: 93 [0], given: 12

### Show Tags

23 Apr 2010, 18:59
IMO it is B.
Premise: A newly discovered disease is thought to be caused by a certain bacterium
Premise: However, recently released data notes that the bacterium thrives(prosper) in the presence of a certain virus
Conclusion: implying that it is actually the virus that causes the new disease
We need to find the supportive evidence.

(A) In the absence of the virus, the disease has been observed to follow infection by the bacterium.
>> This is not supporting statement. It talks about after disease scenario.
(B) The virus has been shown to aid the growth of bacterium, a process which often leads to the onset of the disease.
>> Yes. This supports the conclusion.
(C) The virus alone has been observed in many cases of the disease.
>> This is conflicting. If this is correct then the first premise will go wrong.
(D) In cases where the disease does not develop, infection by the bacterium is usually preceded by infection by the virus.
>> This shows infection by bacteruim is preceded by infection by virus, but specifies in cases where disease does not develop. We should be looking for the disease cases.
(E) Onset of the disease usually follows infection by both the virus and the bacterium.
>> Talking about aftermath of disease. Not useful.
_________________

+1Kudos, if this helps

Manager
Joined: 14 Apr 2010
Posts: 230
Followers: 2

Kudos [?]: 156 [0], given: 1

### Show Tags

08 Jul 2010, 04:27
I chose C since the conclusion says that the actual cause of the disease is virus.
Retired Moderator
Status: 2000 posts! I don't know whether I should feel great or sad about it! LOL
Joined: 04 Oct 2009
Posts: 1713
Location: Peru
Schools: Harvard, Stanford, Wharton, MIT & HKS (Government)
WE 1: Economic research
WE 2: Banking
WE 3: Government: Foreign Trade and SMEs
Followers: 101

Kudos [?]: 940 [0], given: 109

### Show Tags

08 Jul 2010, 15:30
_________________

"Life’s battle doesn’t always go to stronger or faster men; but sooner or later the man who wins is the one who thinks he can."

My Integrated Reasoning Logbook / Diary: http://gmatclub.com/forum/my-ir-logbook-diary-133264.html

GMAT Club Premium Membership - big benefits and savings

Intern
Joined: 02 Jun 2010
Posts: 29
Followers: 0

Kudos [?]: 6 [0], given: 4

### Show Tags

09 Jul 2010, 11:01
poohv005 wrote:
A newly discovered disease is thought to be caused by a certain bacterium. However, recently released data notes that the bacterium thrives(prosper) in the presence of a certain virus, implying that it is actually the virus that causes the new disease.
Which of the following pieces of evidence would most support the data’s implication?
(A) In the absence of the virus, the disease has been observed to follow infection by the bacterium.
(B) The virus has been shown to aid the growth of bacterium, a process which often leads to the onset of the disease.
(C) The virus alone has been observed in many cases of the disease.
(D) In cases where the disease does not develop, infection by the bacterium is usually preceded by infection by the virus.
(E) Onset of the disease usually follows infection by both the virus and the bacterium.

IMO B is undermining the argument. If C is correct it strengthen's the argument that in majority of cases bacterium may not have any role to play in the disease. OA?
VP
Joined: 15 Jul 2004
Posts: 1473
Schools: Wharton (R2 - submitted); HBS (R2 - submitted); IIMA (admitted for 1 year PGPX)
Followers: 22

Kudos [?]: 178 [0], given: 13

### Show Tags

09 Jul 2010, 19:10
C; We need to establish virus as the cause of the disease; there are two conflicting premises - and we are supposed to strengthen one (the data premise) over the other.
Senior Manager
Joined: 19 Nov 2009
Posts: 325
Followers: 5

Kudos [?]: 89 [0], given: 44

### Show Tags

10 Jul 2010, 00:08
C
_________________

"Success is going from failure to failure without a loss of enthusiam." - Winston Churchill

As vs Like - Check this link : http://www.grammar-quizzes.com/like-as.html.

Manager
Joined: 16 Jun 2010
Posts: 171
Followers: 3

Kudos [?]: 44 [0], given: 1

### Show Tags

10 Jul 2010, 03:03
C is my take. We need to support Virus. Virus alone causes the disease along with promoting the bacteria.
_________________

R E S P E C T

Finally KISSedGMAT 700 times 450 to 700 An exprience

Senior Manager
Joined: 23 May 2010
Posts: 441
Followers: 5

Kudos [?]: 104 [0], given: 112

### Show Tags

10 Jul 2010, 21:17
picked b ....but surely its c
Manager
Status: Mesmerized
Joined: 24 Jan 2010
Posts: 180
Location: UAE, Dubai
Followers: 2

Kudos [?]: 114 [0], given: 12

### Show Tags

30 Sep 2010, 00:35
I think it's C, we need show that the only cause of the disease is the Virus not both
_________________

Nanquam Fractum

Manager
Joined: 22 Aug 2008
Posts: 186
Followers: 5

Kudos [?]: 89 [0], given: 11

### Show Tags

02 Oct 2010, 22:42
My take is C

To strengthen the argument we have to show that virus is capable of causing the disease alone.
Manager
Joined: 08 Sep 2010
Posts: 232
Location: India
WE 1: 6 Year, Telecom(GSM)
Followers: 4

Kudos [?]: 261 [0], given: 21

### Show Tags

02 Oct 2010, 23:39
I will go for B
Manager
Joined: 25 Jul 2010
Posts: 141
Followers: 1

Kudos [?]: 399 [0], given: 29

### Show Tags

03 Oct 2010, 01:51
I feel its B. what's the OA?
Intern
Joined: 01 Sep 2010
Posts: 46
Followers: 1

Kudos [?]: 0 [0], given: 0

### Show Tags

15 Nov 2010, 22:00
I vote for C too. What's the OA?
Manager
Joined: 28 Feb 2010
Posts: 176
WE 1: 3 (Mining Operations)
Followers: 7

Kudos [?]: 32 [0], given: 33

### Show Tags

16 Nov 2010, 01:11
It has to be C,
Any event which shows that
Virus is Present--> Disease is present & Bacteria is not present..
makes the presence of bacteria redundant
_________________

Regards,
Invincible...
"The way to succeed is to double your error rate."
"Most people who succeed in the face of seemingly impossible conditions are people who simply don't know how to quit."

Moderator
Joined: 01 Sep 2010
Posts: 3133
Followers: 806

Kudos [?]: 6774 [0], given: 1049

### Show Tags

16 Nov 2010, 06:14
B ...........boys

The argument: a new disease is discovered AND it is helped by the presence of certain virus, to the onset of the disease

B..............
_________________
Senior Manager
Status: Can't give up
Joined: 20 Dec 2009
Posts: 320
Followers: 2

Kudos [?]: 31 [0], given: 35

### Show Tags

16 Nov 2010, 08:12
C) The virus alone has been observed in many cases of the disease.

This is the strongest among the choices.
Senior Manager
Status: Can't give up
Joined: 20 Dec 2009
Posts: 320
Followers: 2

Kudos [?]: 31 [0], given: 35

### Show Tags

16 Nov 2010, 08:22
OA is C. I picked this by google search.

B is too much of a stretch/extreme
Re: CR strengthen question   [#permalink] 16 Nov 2010, 08:22

Go to page    1   2    Next  [ 26 posts ]

Similar topics Replies Last post
Similar
Topics:
6 A newly discovered disease is thought to be caused by a certain bact 7 23 Feb 2016, 08:50
21 A newly discovered painting seems to be the work of 19 14 Jul 2015, 09:38
7 A newly discovered disease is thought to be caused by a 5 18 Jan 2012, 10:09
A newly discovered disease is thought to be caused by a 2 02 Sep 2011, 08:21
A newly discovered painting on wooden panel by Michelangelo 0 18 Jan 2008, 10:40
Display posts from previous: Sort by