Explanation
A. Neither passage primarily addresses the question of strengthening constraints on judges' powers.
B. (Correct Response) Both passages explore the concept of judicial sincerity or candor. Passage A discusses the idea that judges must believe what they say in their opinions, arguing against the notion that sincerity is naive or utopian. Passage B addresses this question by discussing the obligation of judges to give reasons for their decisions, which involves believing in the reasons they provide.
C. While the legitimacy of the courts is a theme, neither passage directly seeks an answer to whether judicial candor is required for institutional legitimacy as the main question.
D. The transparency of judicial decision-making for the benefit of litigants is not the central question in either passage.
E. The costs versus benefits of judicial candor are discussed, but this is not the primary question both passages seek to answer.
Both passages are concerned with whether judges must believe what they state in their opinions, with Passage A discussing it in the context of sincerity and the prudential versus moral reasons for candor, and Passage B examining the obligation of judges to be candid in their reasoning.