Final answer:
The sentence implies a scheduled and intimate exchange, suggesting a religious setting. The correct answer is (A) A priest, as they regularly hear confessions as part of their duties.
Step-by-step explanation:
The sentence 'He came once a month so they could hear each other's confessions.' suggests intimacy and a regular meeting to share personal or possibly sensitive information. Considering the options provided, the most fitting answer is (A) A priest. Priests often hear confessions as part of their religious duties, and it is traditionally done in confidence and on a regular basis, such as once a month. While therapists may also hear personal information, they are not typically associated with the term 'confessions,' which has a more religious connotation. Friends and lovers could also hear confessions, but the formal and scheduled nature of the visits indicates a more structured and ritualistic context, like that found in religious confession.