Q: 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 does not connect with the rest of the story, indicating your choice as 'a' or 'b'. If both sentences are plausible, pick the one that makes less sense.
Title: Terror. Sentence 1: I was walking on the football track with a friend. Sentence 2: As we circled the right end of the track, I saw two kids. Sentence 3: They were riding bikes down the road. Sentence 4: A chain broke, and a kid went sailing in front of a car. Choices: a. He had to order something else instead. b. I screamed as I realized it was my son.
A:
a