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: Once there was a mom who was practicing Karate. Sentence 2: She went to class a few times each week. Sentence 3: She worked so hard she was able to earn her yellow belt. Sentence 4: Once she had her yellow belt she got to brag to her children. Sentence 5: Doing Karate made her happy and strong! Choices: a. Mommy Karate. b. Big Wave.

a