Q: 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'.
Sentence 1: I heard a loud bang. Sentence 2: I ran to my child's bedroom. Sentence 3: The tent he had over his bed had collapsed. Sentence 4: He was trapped inside. Sentence 5: I couldn't help but laugh when I heard him giggle. Choices: a. Bang. b. The Department Store.
A:
a