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: Escaped Hamster. Sentence 1: Our neighbor next door had a hamster. Sentence 2: One day it escaped through the baseboard into our unit. Sentence 3: We put the hamster into a box and left it outside our neighbor's door. Sentence 4: He said his 8 year old son was appreciative. Choices: a. I told my friends their sources may be wrong. b. I was just glad it wasn't a mouse.
Output:
b