Given the task definition and input, reply with output. 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: Full Closet. Sentence 1: Tom was trying to pick out clothes. Sentence 2: He had trouble finding anything he wanted to wear. Sentence 3: He also noticed his closet was really full. Sentence 4: Tom decided to get rid of a lot of his old clothes. Choices: a. He was never able to pay it back. b. It freed up a lot of closet space.
b