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Elimination by Logic and Necessity
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GMAT
GMAT.021 Elimination by Logic and Necessity
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A dashboard question asks which action would most directly test whether higher ad spending caused higher sales. Which answer choice can be eliminated because it is not connected to causal testing?
A
Compare markets with similar seasonality but different ad-spending changes.
B
Ask whether the advertising team's office moved to a different floor.
C
Hold other promotions constant while varying ad spending in a test market.
D
Examine sales in comparable periods when ad spending did not change.
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