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'.
Q: Sentence 1: Tim was a red belt in Taekwondo. Sentence 2: Tim wanted to become a black belt. Sentence 3: Tim needed to successfully break a board with his foot. Sentence 4: Tim hurt his toe trying. Sentence 5: Tim never earned black belt because he would always hurt his toe. Choices: a. Tadpole. b. Toe.
A:
b