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: Benjamin was at a new school, and needed to assert his dominance. Sentence 2: He went onto the playground looking for someone to pick on. Sentence 3: He saw a small kid and pushed him down and laughed. Sentence 4: He felt a tap on his shoulder and turned around. Sentence 5: The little kid's six foot tall brother didn't look very happy. Choices: a. Ring of Fire. b. Bully Meets Bully.
b