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.
Q: Title: Helping Friends. Sentence 1: Miles's friends were going on vacation so they asked him to help. Sentence 2: That help mostly involved caring for their menagerie of pets. Sentence 3: While they were gone he was to feed and water them and clean cages. Sentence 4: Each day he and his partner went over and did their tasks diligently. Choices: a. Tim loved the movie even more after that. b. When Miles's friends returned they were pleased with their pets' care.
A:
b