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 bathroom was starting to smell strange. Sentence 2: The tub was backed up with an odd colored liquid. Sentence 3: I used a plunger on the drain. Sentence 4: A giant ball of hair extracted itself. Sentence 5: I threw it away, feeling sickened. Choices: a. Cholesterol. b. Bathroom.

b