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: Sarah didn't have a lot of friends growing up. Sentence 2: When she got old, she was suddenly very pretty. Sentence 3: She married a famous actress. Sentence 4: Suddenly, everyone wanted to be her friend. Sentence 5: But Sarah knew who her true friends were. Choices: a. Real Friends. b. Dirty Diaper.

a