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: Toni was getting some groceries. Sentence 2: When she was about to check out, she was stopped. Sentence 3: Another woman told Toni she was there first. Sentence 4: Toni was very upset. Sentence 5: She ended up throwing something at the woman. Choices: a. Frozen totally. b. Grocery wars.
b