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: Laura took out her wallet. Sentence 2: She paid for the meal and left the restaurant. Sentence 3: Then the waiter came running out to find her. Sentence 4: He said that she hadn't tipped. Sentence 5: She said she never tips, and the waiter thought she was horrible. Choices: a. Tips. b. Boys Fighting.

a