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'.

Sentence 1: Cindy is an undercover cop. Sentence 2: Her job is very dangerous. Sentence 3: She really likes her job a lot. Sentence 4: She is also a single mother. Sentence 5: She tries to keep the city safe for everyone's children. Choices: a. Safety. b. Pain.
a