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 Bench. Sentence 1: Lynn had inherited a bed from her grandparents. Sentence 2: The mattress was old, so she threw it. Sentence 3: Lynn wanted to keep the frame, but she had a bed. Sentence 4: Lynn took the bed frame apart. Choices: a. She repurposed the frame into a bench. b. He was their favorite animal yet!
a