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: Wimping Out. Sentence 1: Ken had a crush on a girl. Sentence 2: His friends pressured him into telling her. Sentence 3: Ken walked up to her with the intention to do so. Sentence 4: At the last minuted he lost his nerve. Choices: a. His girlfriend said yes enthusiastically. b. He kept walking past her.
b