📊 GMAT Exam Prep

A recent study shows that people who regularly consume dark chocolate have lower blood pressure than those who do not. Therefore, eating dark chocolate helps reduce blood pressure.

A The study controlled for all other dietary and lifestyle factors that could affect blood pressure.
B Dark chocolate is the only food known to lower blood pressure.
C People with naturally lower blood pressure are not more likely to eat dark chocolate.
D The participants in the study were representative of the general population.

✓ Correct Answer: Option C

The argument assumes a causal link. If people with naturally lower blood pressure *choose* to eat dark chocolate, the observed correlation wouldn't prove causation. Option C addresses this potential reverse causation, making it a necessary assumption for the conclusion.

Related GMAT Exam Prep Questions