Last visit was: 01 May 2026, 06:20 It is currently 01 May 2026, 06:20
Close
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
Your Progress

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
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
Close
Request Expert Reply
Confirm Cancel
User avatar
Bunuel
User avatar
Math Expert
Joined: 02 Sep 2009
Last visit: 01 May 2026
Posts: 109,991
Own Kudos:
812,265
 [1]
Given Kudos: 105,972
Products:
Expert
Expert reply
Active GMAT Club Expert! Tag them with @ followed by their username for a faster response.
Posts: 109,991
Kudos: 812,265
 [1]
Kudos
Add Kudos
1
Bookmarks
Bookmark this Post
User avatar
Sathvik02
Joined: 25 Nov 2022
Last visit: 09 Oct 2025
Posts: 202
Own Kudos:
117
 [1]
Given Kudos: 41
Location: India
Concentration: Entrepreneurship, General Management
GMAT 1: 660 Q47 V34
GMAT 2: 640 Q48 V29
GPA: 4
WE:General Management (Manufacturing)
GMAT 2: 640 Q48 V29
Posts: 202
Kudos: 117
 [1]
1
Kudos
Add Kudos
Bookmarks
Bookmark this Post
User avatar
LamboWalker
Joined: 06 Jun 2021
Last visit: 01 Jul 2025
Posts: 249
Own Kudos:
976
 [2]
Given Kudos: 304
GMAT Focus 1: 675 Q86 V81 DI83
GMAT Focus 2: 735 Q90 V85 DI84
GMAT 1: 690 Q48 V35
GMAT Focus 2: 735 Q90 V85 DI84
GMAT 1: 690 Q48 V35
Posts: 249
Kudos: 976
 [2]
2
Kudos
Add Kudos
Bookmarks
Bookmark this Post
User avatar
Bunuel
User avatar
Math Expert
Joined: 02 Sep 2009
Last visit: 01 May 2026
Posts: 109,991
Own Kudos:
Given Kudos: 105,972
Products:
Expert
Expert reply
Active GMAT Club Expert! Tag them with @ followed by their username for a faster response.
Posts: 109,991
Kudos: 812,265
Kudos
Add Kudos
Bookmarks
Bookmark this Post

OFFICIAL EXPLANATION



During ancient times, the floknee was a common animal in the Wekerlee district long before the arrival of humans to the area. However, as the number of clogberry bushes, the floknee's main source of food, became scarce, so did the floknee population. Therefore, the arrival of human inhabitants to the area caused the animal to die out.

Which of the following would it be most useful to establish in order to evaluate the argument?



A. Whether the floknee was a nocturnal creature

Incorrect.

To solve this Investigation question, first break down the argument. The first two sentences are premises. The last sentence begins with the conclusion conjunction Therefore so it's the argument's conclusion.

    Premise A: during ancient times and before the arrival of humans to the area, there were many floknees in the Wekerlee district
    +
    Premise B: the floknees began to die out as their food - clogberry bushes - became scarce
    =
    Conclusion: the arrival of humans caused the floknees to die out

    Vital factor: ?

You are required to find the factor which is most crucial to the author's conclusion. The correct answer is a question which could support or weaken the conclusion depending on its answer.

The answer to this question would not help us determine whether the humans caused the floknee to die out. The fact that it was active during the day or only at night is irrelevant.



B. Whether the clogberries were eaten by humans, or their numbers otherwise dwindled by human activity

We are told that the lack of clogberry bushes caused the floknee's extinction. However, we are not given any data that links the humans to the number of floknees or to the number of bushes. Just because humans arrived at the area does not mean they killed these animals.

If humans ate clogberries, or destroyed the bushes for some reason, then they did indirectly cause the floknees to die out. However, if they had nothing to do with their diminishing food source, then they are not the cause for the creature's extinction.



C. Whether the humans that inhabited the Wekerlee district had mythological beliefs and traditions about the floknee

Incorrect.

To solve this Investigation question, first break down the argument. The first two sentences are premises. The last sentence begins with the conclusion conjunction Therefore so it's the argument's conclusion.

    Premise A: during ancient times and before the arrival of humans to the area, there were many floknees in the Wekerlee district
    +
    Premise B: the floknees began to die out as their food - clogberry bushes - became scarce
    =
    Conclusion: the arrival of humans caused the floknees to die out

    Vital factor: ?

You are required to find the factor which is most crucial to the author's conclusion. The correct answer is a question which could support or weaken the conclusion depending on its answer.

This answer choice asks a question about a topic that has no relation to the argument. The conclusion deals with what caused the creature to die out, not what the culture of the humans in the area thought about it.



D. Whether the rainfall in the Wekerlee district towards the end of the floknee's existence was frequent

Incorrect.

If we answered the question in this answer choice we still would not know whether the author was correct. We would need to assume far too much to determine that the floknee died out because of a drought. For all we know, the floknee could be a desert creature.



E. Whether there is a high population of predators living in the Wekerling district today

Incorrect.

Since the argument refers to events that took place a long time ago, the current status of the area is beyond the scope of the argument. The conclusion deals with something that happened in the past so the number of predators in the area today is irrelevant.
Moderators:
GMAT Club Verbal Expert
7391 posts
513 posts
363 posts