Q: In this task, you're given the title of a five-sentence story, the first four sentences, and two options for the fifth sentence as a and b. Your job is to pick the sentence option that seamlessly connects with the rest of the story, indicating your choice as 'a' or 'b'. If both sentences are plausible, pick the one that makes more sense.
Title: Bathroom. 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. Choices: a. I went home feeling a lot better knowing I was healthy. b. I threw it away, feeling sickened.
A:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
b