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'.

Sentence 1: Alister runs for exercise. Sentence 2: He has run with friends and by himself. Sentence 3: One day his friend invited him to run in a charity race. Sentence 4: He decided to train hard and run in the race. Sentence 5: Alister came in the top 10 for the charity race. Choices: a. Jeff the Baker. b. Alister's Race.
b