Detailed 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.
Q: Title: A Fall from a Bike. Sentence 1: Gabe rode his bike to school each morning. Sentence 2: One morning he fell off his bike. Sentence 3: Gabe sprained his ankle. Sentence 4: A neighbor found Gabe and called his mother. Choices: a. Gabe's mother picked him up and brought him to the doctor. b. We diverted her with the promise of chocolate milk.
A:
a