Given the task definition and input, reply with output. 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: Greg asked Mike if he could do the laundry. Sentence 2: Mike agreed for a price. Sentence 3: Mike didn't know what he was doing. Sentence 4: He mixed all the colors and ruined the clothes. Sentence 5: So Greg was angry at him in the end. Choices: a. Bill's Bad Wrist. b. The bad roommate.
b