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: My coworker got engaged this spring. Sentence 2: She was happy, and planned a wedding next year. Sentence 3: This summer she turned on her fiance's cellphone. Sentence 4: She found several Snapchats to an old girlfriend. Sentence 5: She broke off the engagement in tears. Choices: a. Prejudice. b. Affair.
A:
b