Instructions: 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.
Input: Title: Rats!. Sentence 1: Ron's small red pet rat, Matt, escaped from its cage. Sentence 2: He frantically looked everywhere for it. Sentence 3: He ran up and down the hall of the apartment building searching. Sentence 4: Ron arrived just in time to see the janitor stomp Matt to death. Choices: a. He threw the still twitching rat unceremoniously into a trash bag. b. He knew that if he had time to paint, it wouldn't of happened.
Output:
a