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: Costume. Sentence 1: I put my Halloween costume on in readiness for a party. Sentence 2: I had spent the previous week meticulously sewing my costume. Sentence 3: When I got to the party, I saw my friend was also dressed as a pirate. Sentence 4: She told me she had bought her costume the night before. Choices: a. They attended the game and even caught a home run ball! b. I was angry because her costume looked better than mine.
A:
b