Instructions: 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: paper. Sentence 1: The man went out to his mailbox. Sentence 2: He looked for his paper. Sentence 3: His paper was not there. Sentence 4: He called his paper boy. Choices: a. His paper boy was running late. b. He found another place to volunteer.
Output:
a