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: Peter went to bed too late last night. Sentence 2: As a result, his mom made some changes. Sentence 3: His mom told him he had to go to bed earlier. Sentence 4: Peter was disappointed. Sentence 5: He didn't want to go to bed early. Choices: a. New rules. b. Room.

a