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 was in an accident. Sentence 2: He was injured and lost mobility. Sentence 3: He used it as an excuse not to work out. Sentence 4: He would eat out of boredom. Sentence 5: Eventually Tom realized he had gained a lot of weight. Choices: a. Running Race. b. Gaining Weight.

b