You will be given a definition of a task first, then some input of the task.
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: Hearing. Sentence 1: Tom was a student at middle school. Sentence 2: There was a health fair at his school. Sentence 3: He decided to get his hearing checked. Sentence 4: He really enjoyed the testing process. Choices: a. He was happy to learn he was in perfect health. b. Cal and his friend met up at a diner instead.
Output:
a