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 bought a new set of tools. Sentence 2: They had a lifetime warranty. Sentence 3: He broke them within a week. Sentence 4: They refused to replace them for him. Sentence 5: They claimed Tom broke them on purpose. Choices: a. Popcorn. b. Broken Tools.

b