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: Tom went to to store to get food. Sentence 2: He didn't know the floor was just mopped. Sentence 3: The person who mopped didn't put up a wet floor sign. Sentence 4: Tom slipped and fell. Sentence 5: I couldn't help laughing at him! Choices: a. Grocery Store. b. No Batteries.

a