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: Race Preparation. Sentence 1: In preparation for an upcoming bike race Ryan road his bike nightly. Sentence 2: It was summer in a hot climate, so night rides were ideal. Sentence 3: While peddling over a bridge a car veered toward him. Sentence 4: Drenched in sweat and tired, he peddled furiously to avoid the car. Choices: a. Ryan dodged, stopped, and yelled an expletive at the car as it passed. b. They had forgot about him and left him in the office!
a