Definition: 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.
Input: Title: Rainy Collision. Sentence 1: Heavy rain occurred on the highway. Sentence 2: There was major traffic but everyone drove slowly. Sentence 3: I had to increase my windshield wipers and flash my lights. Sentence 4: Another driver collided with me since she was in a rush. Choices: a. What's worse is that our mom wasn't sympathetic about it. b. Since we couldn't step outside due to the rain, she drove off.
Output:
b