Detailed Instructions: 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: Rocky decided to join the Marines. Sentence 2: At boot camp he exercised hard every day. Sentence 3: Rocky also ate healthier food than he did back home. Sentence 4: As a result, Rocky lost a lot of weight at boot camp. Sentence 5: When he went back home, many friends didn't recognize him. Choices: a. Brian finds 10 bucks. b. Boot Camp.
A:
b