Passage Summary: People often think chocolate gives them pimples, but it might actually be that stress causes both the pimples and the chocolate cravings at the same time.

Conclusion: The common belief that chocolate causes acne is likely a mistaken interpretation of a correlation.

Reasoning: Scientific evidence suggests that stress causes acne and that people under stress tend to consume more chocolate.

Analysis: This argument employs a specific strategy of offering an alternative explanation for a correlation. The author identifies a perceived cause-and-effect relationship and introduces a third variable—stress—that accounts for both phenomena. To identify the correct answer, look for a description of how the author reinterprets the evidence to suggest that the 'cause' and 'effect' are actually both effects of a different underlying factor. This is a classic move to undermine a causal claim without denying the observed data.