Final answer:
The coach is demonstrating the skill of identifying discrepancies by highlighting the inconsistency between the client's stated goal of improving sleep by going to bed by 10 pm and their inability to do so throughout the week.
Step-by-step explanation:
The skill the coach is demonstrating in the provided dialogue is B. Identifying discrepancies. This skill involves the coach identifying and pointing out inconsistencies between the client's stated goals and their actual behaviors. In this case, the discrepancy is between the client's goal of making sleep a top priority by going to bed by 10 pm and the reality that they did not manage to do so. This can help the client become aware of the incongruence between their actions and their stated objectives, which is the first step in crafting strategies to align behaviors more closely with set goals.