Last visit was: 20 Apr 2026, 20:52 It is currently 20 Apr 2026, 20:52
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
MartyMurray
Joined: 11 Aug 2023
Last visit: 20 Apr 2026
Posts: 1,830
Own Kudos:
7,078
 [9]
Given Kudos: 209
GMAT 1: 800 Q51 V51
Expert
Expert reply
Active GMAT Club Expert! Tag them with @ followed by their username for a faster response.
GMAT 1: 800 Q51 V51
Posts: 1,830
Kudos: 7,078
 [9]
2
Kudos
Add Kudos
7
Bookmarks
Bookmark this Post
avatar
ManifestDreamMBA
Joined: 17 Sep 2024
Last visit: 21 Feb 2026
Posts: 1,387
Own Kudos:
897
 [1]
Given Kudos: 243
Posts: 1,387
Kudos: 897
 [1]
1
Kudos
Add Kudos
Bookmarks
Bookmark this Post
User avatar
pk14y
Joined: 15 Aug 2018
Last visit: 20 Apr 2026
Posts: 24
Own Kudos:
10
 [2]
Given Kudos: 340
Posts: 24
Kudos: 10
 [2]
2
Kudos
Add Kudos
Bookmarks
Bookmark this Post
User avatar
MartyMurray
Joined: 11 Aug 2023
Last visit: 20 Apr 2026
Posts: 1,830
Own Kudos:
Given Kudos: 209
GMAT 1: 800 Q51 V51
Expert
Expert reply
Active GMAT Club Expert! Tag them with @ followed by their username for a faster response.
GMAT 1: 800 Q51 V51
Posts: 1,830
Kudos: 7,078
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Since Theall’s, a retail store located in Beach Haven, had a strong year two years ago, management decided last year that the store could afford to advertise more during the summer last year than it had in previous summers. Then, last year, Theall’s sales in the summer were stronger than in any previous summer.

Determining which of the following would be most helpful in determining whether the increase in sales can be attributed to the increase in advertising spending?


In this question, the conclusion is not stated in the passage. Rather, the conclusion is presented in question stem. So, to answer this question, we have to evaluate the case for the following conclusion:

the increase in sales can be attributed to the increase in advertising spending

The passage presents some support for the conclusion, which is the following:

management decided last year that the store could afford to advertise more during the summer last year than it had in previous summers. Then, last year, Theall’s sales in the summer were stronger than in any previous summer.

We see that the passage indicates that there was a correlation between an increase in advertising spending and an increase in sales. So, that correlation could be taken as indicating that the increase in sales can be attributed to the increase in advertising spending.

The correct answer will be the one such that determining what it mentions will weaken or strengthen the case for the conclusion.

(A) Whether by improving customer service Theall’s could have increased sales without spending more on advertising

Determining this would not help with evaluating the case for the conclusion.

After all, information on whether Theall's COULD HAVE increased sales by improving customer service does not indicate whether the increase in advertising spending DID cause an increase in sales.

Eliminate.

(B) Whether the increase in Theall’s profits attributable to the increase in sales was greater than the increase in advertising spending

Determining this would not help with evaluating the case for the conclusion.

After all, regardless of whether the increase in profits was greater than the increase in advertising spending, the increase in advertising spending could have caused the increase in sales.

If we were seeking to determine whether the increase in advertising spending paid off, this choice would be relevant, but that's not what we're seeking to determine.

Eliminate.

(C) What proportion of the increase in sales can be attributed to repeat customers spending more at Theall’s last summer than they spent the previous summer

Not only new customers but also repeat customers can be influenced by advertising.

So, regardless of what proportion of the increase in sales can be attributed to repeat customers spending more, the increase in advertising spending may or may not have been the cause of the increase in sales.

Eliminate.

(D) How sales of other retail stores in Beach Haven last summer compared with their sales the previous summer

This choice is interesting.

After all, if sales of other stores in Beach Haven also increased, then it could be that the increase in Theall's sales can be attributed to some general factors that affected all stores in Beach Haven rather than the increase in advertising.

On the other hand, if sales of other stores did not increase, then we can be more confident that the reason for the increase in Theall's sales was the increase in advertising.

So, determining what this choice mentions would help with determining whether the increase in sales can be attributed to the increase in advertising spending.

Keep.

(E) Whether Theall’s sales for last summer were stronger than its sales for any other season last year

This choice introduces an irrelevant comparison.

After all, what we're seeking to determine is whether the increase in advertising spending from the previous summer to the past summer was the cause of the increase in sales from the previous summer to the past summer.

We don't know anything about how advertising spending in the summer compares with that in other seasons. For instance, for all we know, Theall's increased advertising spending for all of last year.

Also, we have no idea how sales in the summer normally compare with sales in other seasons for Theall's.

So, information on how sales in the summer compared with sales in other seasons isn't useful for determining whether the increase in sales last summer can be attributed to the increase in advertising spending.

Eliminate.

Correct answer: D
User avatar
elslyknight
Joined: 03 Jul 2024
Last visit: 25 Mar 2026
Posts: 23
Own Kudos:
18
 [3]
Given Kudos: 10
GMAT Focus 1: 645 Q81 V81 DI83
GMAT Focus 2: 685 Q88 V83 DI81
GMAT Focus 2: 685 Q88 V83 DI81
Posts: 23
Kudos: 18
 [3]
2
Kudos
Add Kudos
1
Bookmarks
Bookmark this Post
Deciding between C and D - let's take the extreme answers to the questions and see which one surely has opposite effects on the conclusion.

C
  1. Major portion of increase in sales is attributable to repeat customers
    • if the advertisement was targetted to repeat customers, the advertisement works - Strengthens the arguement
    • if the advertisement was generic - Does nothing to the argument.
  2. Small portion of increase in sales is attributable to repeat customers.
    • Similar to above - targeted to repeat customers - Weakens
    • Generic - Does nothing

The problem with C is that there are more things which need to be asked about the advertisement, C in itself doesn't reveal anything conclusively about the viability of the conclusion.


D
  1. Other retail stores did well - Highly likely that the economic conditions/retail consumption was greater overall - Weakens argument.
  2. Other retail stores did flat OR poorly - Pretty much attributable to the ads that Theall did much better - Strengthens argument.

D is our answer.
User avatar
MartyMurray
Joined: 11 Aug 2023
Last visit: 20 Apr 2026
Posts: 1,830
Own Kudos:
Given Kudos: 209
GMAT 1: 800 Q51 V51
Expert
Expert reply
Active GMAT Club Expert! Tag them with @ followed by their username for a faster response.
GMAT 1: 800 Q51 V51
Posts: 1,830
Kudos: 7,078
Kudos
Add Kudos
Bookmarks
Bookmark this Post
elslyknight
Deciding between C and D - let's take the extreme answers to the questions and see which one surely has opposite effects on the conclusion.

C
  1. Major portion of increase in sales is attributable to repeat customers
    • if the advertisement was targetted to repeat customers, the advertisement works - Strengthens the arguement
    • if the advertisement was generic - Does nothing to the argument.
  2. Small portion of increase in sales is attributable to repeat customers.
    • Similar to above - targeted to repeat customers - Weakens
    • Generic - Does nothing

The problem with C is that there are more things which need to be asked about the advertisement, C in itself doesn't reveal anything conclusively about the viability of the conclusion.


D
  1. Other retail stores did well - Highly likely that the economic conditions/retail consumption was greater overall - Weakens argument.
  2. Other retail stores did flat OR poorly - Pretty much attributable to the ads that Theall did much better - Strengthens argument.

D is our answer.
Nice work - a well-organized, cogent way of handling the two choices.
User avatar
IZ19
Joined: 21 Nov 2024
Last visit: 24 Dec 2025
Posts: 2
Posts: 2
Kudos: 0
Kudos
Add Kudos
Bookmarks
Bookmark this Post
(C) What proportion of the increase in sales can be attributed to repeat customers spending more at Theall’s last summer than they spent the previous summer.

If you know how much sales increase come from exisitng customers, you can calcualte sales coming from new customers, which were likely to have been attracted by advertising
User avatar
MartyMurray
Joined: 11 Aug 2023
Last visit: 20 Apr 2026
Posts: 1,830
Own Kudos:
Given Kudos: 209
GMAT 1: 800 Q51 V51
Expert
Expert reply
Active GMAT Club Expert! Tag them with @ followed by their username for a faster response.
GMAT 1: 800 Q51 V51
Posts: 1,830
Kudos: 7,078
Kudos
Add Kudos
Bookmarks
Bookmark this Post
IZ19
(C) What proportion of the increase in sales can be attributed to repeat customers spending more at Theall’s last summer than they spent the previous summer.

If you know how much sales increase come from exisitng customers, you can calcualte sales coming from new customers, which were likely to have been attracted by advertising
That's not really the case.

Advertising can cause existing customers to shop more too.

We have to be careful use only clearly supported ideas to support our answers.
User avatar
lulomfds
Joined: 30 Jan 2021
Last visit: 09 Mar 2026
Posts: 1
Given Kudos: 3
Posts: 1
Kudos: 0
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Why Option D? We don't know much about the other stores. What if they also increased advertising, yet did worse than Thealls?
User avatar
DmitryFarberMPrep
User avatar
Manhattan Prep Instructor
Joined: 22 Mar 2011
Last visit: 03 Mar 2026
Posts: 3,005
Own Kudos:
8,624
 [1]
Given Kudos: 57
Expert
Expert reply
GMAT Focus 1: 745 Q86 V90 DI85
Posts: 3,005
Kudos: 8,624
 [1]
1
Kudos
Add Kudos
Bookmarks
Bookmark this Post
We aren't concerned with the advertising success of other stores, since those would be different campaigns, and they wouldn't reflect on whether this one was successful. The reason we care about other stores at all is that we want to make sure any change at Thealls is not just part of a general trend. It's like if a company fires their CEO and the stock drops 10% the next day. Was it because of the firing? What if it turned out that most stocks dropped 10% or more that day? Then maybe it was some broader thing going on, and the drop occurring right after the firing was just a coincidence.
lulomfds
Why Option D? We don't know much about the other stores. What if they also increased advertising, yet did worse than Thealls?
Moderators:
GMAT Club Verbal Expert
7391 posts
494 posts
358 posts