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: Jessica was trying to chat with her boyfriend on the phone. Sentence 2: She could tell her little sister was spying through the door. Sentence 3: Quietly, she got up and walked to the door. Sentence 4: Then, she quickly opened it and kicked her sister. Sentence 5: The two had a huge fight then, but luckily mom took Jessica's side. Choices: a. The Bus Fight. b. A Sister Fight.

b