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: The Lagoon. Sentence 1: Lindsay was uneasy. Sentence 2: She had to walk by a murky lagoon to get home. Sentence 3: She saw dark, dirty water with some movement in it. Sentence 4: She ran as fast as she could. Choices: a. His mom gave him bread and Charlie happily fed the ducks! b. She was scared there was an alligator!
Output:
b