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's mother was obese. Sentence 2: Tom wanted to help her improve her life. Sentence 3: Tom suggested for her to try Pilates. Sentence 4: She tried Pilates. Sentence 5: She felt much better after incorporating Pilates into her life. Choices: a. Ice. b. Pilates.

b