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: Martin and Bill both needed new shoes, so they went shopping together. Sentence 2: While shopping, Bill kept acting rude towards the salespeople. Sentence 3: Martin tried to confront him about it. Sentence 4: Bill yelled at Martin and broke off their friendship right there. Sentence 5: Martin felt terrible, but he knew it was for the best. Choices: a. Shopping with Bill. b. Marie.

a