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: Ralf's jaw popped with force seeming like a sledgehammer. Sentence 2: He had to remedy the situation, but there was a massive problem. Sentence 3: Ralf's love of chewing gum couldn't be compromised. Sentence 4: His dentist told him a nightguard would prevent grinding as he slept. Sentence 5: This proved to eliminate pain when he consumed his old favorite! Choices: a. The Jaw. b. Duke of Dinos.

a