If revenue rises and costs stay flat, profit must rise. Which assumes:
ASales mix unchanged.
BTax rates fell.
CNo new costs categories appeared.
DCustomers paid on time.
Answer & Solution
Correct answer: C. No new costs categories appeared.
1. Need 'no costs change' which assumes no new cost lines.
_Source: 501-GMAT-Questions Ch 2 Critical Reasoning_
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