Question

what logical evidence do levitt and dubner present in response to the counterclaim that a 7–7 wrestler might be more motivated to win and therefore perform better?
○ in the next match, 7–7 wrestlers’ results drop below their predicted percentage.
○ the 7–7 wrestlers do well against both 8–6 and 9–5 opponents.
○ wrestling matches only last a few seconds and are won by a quick exertion of force.
○ wrestlers from the same stable do not oppose one another.

Explanation:

Levitt and Dubner need to show that the 7 - 7 wrestlers' performance isn't just due to motivation. If their results drop below predicted percentage in the next match, it indicates that the initial good performance (which could be wrongly attributed to extra motivation) isn't sustainable. This undermines the counterclaim that motivation (and thus better performance) is the reason for their success. The other options either don't address the counter - claim (e.g., "Wrestling matches only last a few seconds...") or support a different aspect (e.g., "Wrestlers from the same stable...") or don't refute the motivation - performance link (e.g., "The 7 - 7 wrestlers do well...").

Answer:

In the next match, 7–7 wrestlers’ results drop below their predicted percentage.