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: Tom's bathtub was getting dirty. Sentence 2: None of his roommates wanted to clean it. Sentence 3: He didn't want to clean it either. Sentence 4: It kept getting dirtier. Sentence 5: Eventually Tom relented and cleaned it. Choices: a. Deer Hunting. b. Dirty Bathtub.

b