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: The Quiz Bowl. Sentence 1: It had all come down to this. Sentence 2: Mary had to answer this last question for the win. Sentence 3: Her team was anxious, but knew Mary was very smart. Sentence 4: The question came and she thought hard about it. Choices: a. Mary came up with the right answer and her team celebrated! b. Finally the cat ran out the door and down the block.
a