Answer choice (E) claims that the argument "provides a counterexample to show that, contrary to the assumption on which the commonly held position rests, causes do not always preceded their effects."
So, (E) suggests that the argument provides a counterexample in which the effect precedes the cause. An example of such a counterexample would be a person who reports that their having an acne breakout is then followed by them eating large amounts of chocolate. This is not what is occurring in the passage. In fact, the passage does not offer any specific examples. Instead, it provides evidence that suggests an alternate cause for both the chocolate consumption and the acne - stress. This is what the correct answer- answer choice (B)- explains.
Does that make sense? Please let us know if you have any additional questions!
