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: Anna was diving with her friends. Sentence 2: Then her air line snagged. Sentence 3: Anna could not breathe! Sentence 4: She hurried up to the surface. Sentence 5: There, she untangled her line. Choices: a. Beat Up. b. Diver.

b