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: Christopher had a beautiful girlfriend Chloe. Sentence 2: He and Chloe were compatible in many ways. Sentence 3: Christopher met a girl online who he started to like more. Sentence 4: They met up and began seeing each other behind Chloe's back. Sentence 5: Christopher ended up losing both girls because of his greed. Choices: a. bikes. b. The Grass Is Greenest Where You Water It.

b