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: My sister told me about a breast cancer awareness marathon. Sentence 2: I was interested so I listened to her talk about it. Sentence 3: After a short time, me and her decided on signing up together. Sentence 4: Race day came, and we took off to our vehicles and met up. Sentence 5: As we exited, we saw all the runners and couldn't wait to join in. Choices: a. The Seashell. b. The Marathon.

b