Given the task definition and input, reply with output. 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: Reynolds thought he was a great singer. Sentence 2: He was challenged by Beaux to sing off. Sentence 3: Reynolds accepted the challenge. Sentence 4: While Beaux practiced hard, Reynolds did not. Sentence 5: Beaux won by a landslide. Choices: a. Sing "Off. b. Winning Queen.
a