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: Greg's room was very dusty. Sentence 2: But he didn't feel like cleaning it. Sentence 3: One morning, his throat felt very sore. Sentence 4: And he regret not cleaning up the dust. Sentence 5: So he cleaned it up immediately and never had a sore throat again. Choices: a. Stale Bread. b. Dusty Room.

b