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: A Broken Window. Sentence 1: John drove on the highway. Sentence 2: There was a truck in front of him there. Sentence 3: A stone from its trunk jumped into John's car. Sentence 4: John's window cracked. Choices: a. Nelson no longer picked on anyone else from that day forward. b. He had to stop and make a call to the car service.
A:
b