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: Larry was wondering why it got dark early. Sentence 2: He then wondered why he was so sleepy. Sentence 3: Eventually he realized his clock was broken. Sentence 4: Larry decided to replace it. Sentence 5: He bought a new one at the store. Choices: a. Broken Clock. b. Dehydrating.

a