medium · GMAT Verbal
Argument: A fitness center launched a marketing campaign featuring professional athletes. Membership sign-ups increased by 15% in the following month. The owners credited the athlete endorsements for the growth.
Which of the following would be most useful to determine in order to evaluate the owners' credit?
- Whether other fitness centers in the city use similar marketing strategies featuring local celebrities.
- Whether the majority of new members signed up for annual or monthly membership plans.
- Whether the center offered a significant discount on enrollment fees during the same month as the campaign.
- Whether the fitness center's overall annual revenue increased in the year the marketing campaign was launched.
- Whether the professional athletes featured in the ads actually use the fitness center's facilities.
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