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: Consider Input: Title: Being Stubborn. Sentence 1: Jen felt extremely hot when she came home. Sentence 2: She decided to take a nap. Sentence 3: Her mom took her temperature and found out that she had a fever. Sentence 4: Jen refused to go to the hospital and stayed in her bed. Choices: a. She agreed to go when the fever got worse. b. Steve ended up buying the brand on sale.

Output: a

Input: Consider Input: Title: A River Ride. Sentence 1: Janice and her family were going on a ride. Sentence 2: They had rented a boat. Sentence 3: They were going up the river in their boat. Sentence 4: They were all having a marvelous time. Choices: a. The boat ride would be remembered by all of them for a long time. b. She reeled it in, what a whopper!

Output: a

Input: Consider Input: Title: The Runaway Cat. Sentence 1: When Jo opened her door to go to work, her cat Mac escaped outside. Sentence 2: As Jo attempted to catch Mac, the cat ran away. Sentence 3: Jo chased after Mac until the cat climbed up a tree. Sentence 4: Jo climbed up the tree and grabbed Mac. Choices: a. Jo carried Mac back into the house and went to work. b. The waiter apologized even though it was Tom's fault.
Output: a