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31 May 2026, 03:10
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Difficulty:
55%
(hard)
Question Stats:
66% (01:54) correct
34%
(02:58)
wrong
based on 44
sessions
History
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Last August most gasoline stations in the XT chain of gasoline stations participated in a temporary sales promotion that XT sponsored. In the promotion, any customers who purchased ten or more gallons of gasoline were entitled to a free car wash. For the month of August, the XT chain’s gasoline sales were five percent higher than in August the previous year. Evidently the promotion was successful as a means of boosting sales.
Which of the following, if true, most strengthens the argument?
A. During last August, some of XT’s competitors also had sales promotions in effect and also experienced sales increases as compared to the previous August.
B. The money that XT earned from the increase in gasoline sales was not enough to offset the cost of providing free car washes during the promotion.
C. Some customers who took advantage of the promotion would have made smaller but more frequent gasoline purchases at XT gasoline stations if the promotion had not been in effect.
D. XT gasoline stations that participated in the promotion but did not have car wash facilities on their premises gave vouchers that could be used at a nearby car wash.
E. Last August the XT gasoline stations that did not participate in the promotion had no increase in gasoline sales as compared to their sales the previous August.
Which of the following, if true, most strengthens the argument?
A. During last August, some of XT’s competitors also had sales promotions in effect and also experienced sales increases as compared to the previous August.
B. The money that XT earned from the increase in gasoline sales was not enough to offset the cost of providing free car washes during the promotion.
C. Some customers who took advantage of the promotion would have made smaller but more frequent gasoline purchases at XT gasoline stations if the promotion had not been in effect.
D. XT gasoline stations that participated in the promotion but did not have car wash facilities on their premises gave vouchers that could be used at a nearby car wash.
E. Last August the XT gasoline stations that did not participate in the promotion had no increase in gasoline sales as compared to their sales the previous August.
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31 May 2026, 10:53
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AbhishekP220108
Similar question from GMAT Prep Focus mocks: https://gmatclub.com/forum/last-august- ... 60887.html
31 May 2026, 17:00
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Last August most gasoline stations in the XT chain of gasoline stations participated in a temporary sales promotion that XT sponsored. In the promotion, any customers who purchased ten or more gallons of gasoline were entitled to a free car wash. For the month of August, the XT chain’s gasoline sales were five percent higher than in August the previous year. Evidently the promotion was successful as a means of boosting sales.
Which of the following, if true, most strengthens the argument?
The argument says XT ran a promotion at most stations and August gasoline sales increased by five percent compared with the previous August. The key issue is whether the increase was caused by the promotion rather than by some general factor affecting all XT stations or the gasoline market overall.
(A) During last August, some of XT’s competitors also had sales promotions in effect and also experienced sales increases as compared to the previous August.
This weakens rather than strengthens. If competitors also had promotions and also saw sales increases, XT’s increase may have been part of a broader market pattern, not necessarily caused by XT’s promotion.
(B) The money that XT earned from the increase in gasoline sales was not enough to offset the cost of providing free car washes during the promotion.
This does not strengthen the claim that sales increased because of the promotion. It concerns profitability, not whether the promotion boosted gasoline sales.
(C) Some customers who took advantage of the promotion would have made smaller but more frequent gasoline purchases at XT gasoline stations if the promotion had not been in effect.
This weakens the argument. It suggests that some customers may have simply bought the same amount of gasoline in larger individual purchases, not more gasoline overall.
(D) XT gasoline stations that participated in the promotion but did not have car wash facilities on their premises gave vouchers that could be used at a nearby car wash.
This only explains how the promotion was implemented at some stations. It does not show that the promotion caused the sales increase.
(E) Last August the XT gasoline stations that did not participate in the promotion had no increase in gasoline sales as compared to their sales the previous August.
This is correct. If participating stations were part of the chainwide increase but nonparticipating stations had no increase, that supports the idea that the promotion, not some general XT-wide factor, caused the sales boost. This gives a useful comparison group.
Answer: (E)
Which of the following, if true, most strengthens the argument?
The argument says XT ran a promotion at most stations and August gasoline sales increased by five percent compared with the previous August. The key issue is whether the increase was caused by the promotion rather than by some general factor affecting all XT stations or the gasoline market overall.
(A) During last August, some of XT’s competitors also had sales promotions in effect and also experienced sales increases as compared to the previous August.
This weakens rather than strengthens. If competitors also had promotions and also saw sales increases, XT’s increase may have been part of a broader market pattern, not necessarily caused by XT’s promotion.
(B) The money that XT earned from the increase in gasoline sales was not enough to offset the cost of providing free car washes during the promotion.
This does not strengthen the claim that sales increased because of the promotion. It concerns profitability, not whether the promotion boosted gasoline sales.
(C) Some customers who took advantage of the promotion would have made smaller but more frequent gasoline purchases at XT gasoline stations if the promotion had not been in effect.
This weakens the argument. It suggests that some customers may have simply bought the same amount of gasoline in larger individual purchases, not more gasoline overall.
(D) XT gasoline stations that participated in the promotion but did not have car wash facilities on their premises gave vouchers that could be used at a nearby car wash.
This only explains how the promotion was implemented at some stations. It does not show that the promotion caused the sales increase.
(E) Last August the XT gasoline stations that did not participate in the promotion had no increase in gasoline sales as compared to their sales the previous August.
This is correct. If participating stations were part of the chainwide increase but nonparticipating stations had no increase, that supports the idea that the promotion, not some general XT-wide factor, caused the sales boost. This gives a useful comparison group.
Answer: (E)
