Sales rep: 'Customers prefer X.' Weakens it most:
AX has loyal customers.
BSales rose anyway.
CSurvey method oversampled X buyers.
DMarketing was constant.
Answer & Solution
Correct answer: C. Survey method oversampled X buyers.
1. Biased sample undercuts the claim.
_Source: 501-GMAT-Questions Ch 2 Critical Reasoning_
Related questions
Add to weaken: 'Vitamin C prevents colds.'A claims 'X causes Y' because both rose. Best counter?Newspaper sales fell 30%. Editor concludes ads must rise. Weaken?A factory cut waste 20%. Profits grew the same year. Therefore the cut caused the profit. A study finds that towns near coal mines have higher rates of respiratory illness. Which oA trial production run using a new process showed a 15% cost reduction. Managers concluded