A marketing campaign claims to boost brand awareness by 25% in four weeks.

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This question tests how to verify a marketing claim with objective evidence by comparing a baseline and follow-up measurement collected independently. When a campaign claims a 25% boost in brand awareness in four weeks, the strongest support comes from someone not involved in the campaign who measures brand recognition both before and after. An independent panel providing these measurements ensures the result isn’t biased by internal reporting and shows that a real change occurred over the four-week period.

The option that uses an independent panel to measure recognition before and after fits this best, because it offers credible, baseline-and-change evidence. It demonstrates that the reported increase is based on external data rather than internal numbers or selective reporting.

Other options don’t meet this standard of verification. Who funds the study doesn’t prove the claim itself and can introduce bias. If awareness rose only among current customers, that would limit the scope and not substantiate a general brand-awareness increase for the broader audience. Repeating the same campaign last year with no change doesn’t provide evidence about the current four-week period and wouldn’t verify the stated improvement.