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: The boy sneered. Sentence 2: Another boy smacked him on the face. Sentence 3: The boy look confused. Sentence 4: The other boy smacked him again. Sentence 5: He told him not to sneer. Choices: a. Sneering. b. How Progressive.

a