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: The Rain Run. Sentence 1: Mike was supposed to walk home from work. Sentence 2: That night, it was raining hard. Sentence 3: He decided to run to get out of the cold as fast as possible. Sentence 4: As he ran, he almost slipped in the rain. Choices: a. She spoke a piece about him. b. Luckily he made it home safely in half of the time.
b