Given the task definition and input, reply with output. 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: The Fever. Sentence 1: Carl caught a fever over the weekend. Sentence 2: He did not go to school on the following Monday. Sentence 3: His mom fixed a bowl of chicken noodle soup for him. Sentence 4: Carl felt better a few days later. Choices: a. The bear watched as she faded into the woods. b. He returned to school that following Thursday.
b