In this task, you're given the title of a five-sentence story, the first four sentences, and two options for the fifth sentence as a and b. Your job is to pick the sentence option that seamlessly connects with the rest of the story, indicating your choice as 'a' or 'b'. If both sentences are plausible, pick the one that makes more sense.

Title: Mom's Day Off. Sentence 1: On Sunday, Michael saw that his wife, Lydia, looked especially tired. Sentence 2: He decided to give his wife a break. Sentence 3: So, he took the kids to a museum. Sentence 4: While the rest of the family was away, Lydia was able to take a nap. Choices: a. She agreed to give him his space until he is as comfortable as her. b. When Michael and the kids returned, Lydia looked more rested.
b