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: Accident. Sentence 1: Marty was driving his car along a coastal road. Sentence 2: He wasn't paying attention and ran off the road. Sentence 3: He hit the guardrail and tumbled down the cliff. Sentence 4: His car crashed into the ocean and started to sink. Choices: a. Marty unbuckled and rolled down the window, and was ok. b. Her sister lives in the building and got us out.
Output:
a