In this task, you're given five sentences, numbered 1 through 5, and two options a and b for possible titles for the story. Your job is to choose the title that better fits the story. Indicate your choice by 'a' or 'b'.

Sentence 1: Mitch and Polly needed a sofa for their apartment. Sentence 2: Their friend had one for sale at a good price. Sentence 3: Mitch and Polly drove to his apartment to buy it. Sentence 4: They had forgotten that their friend lived on the third floor. Sentence 5: Their friend helped Mitch and Polly carry the sofa down the stairs. Choices: a. Third Floor. b. Bugged Baby.
a