Definition: 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'.
Input: Sentence 1: The man bought a car stereo. Sentence 2: He had it installed. Sentence 3: He went to try it out. Sentence 4: One of the speakers didn't work. Sentence 5: The installer had to fix it. Choices: a. Beef Bun. b. car stereo.

b