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A factory cut waste 20%. Profits grew the same year. Therefore the cut caused the profit. Weaken?

AA new product launched mid-year.
BWaste figures match prior year.
CWorkers worked fewer shifts.
DThe factory remained the same size.
Answer & Solution
Correct answer: A. A new product launched mid-year.
1. Alternative cause: new product. Weakens the implied causal link. _Source: 501-GMAT-Questions Ch 2 Critical Reasoning_
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