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: Julie went to the mall to shop for shoes. Sentence 2: When she walked into the store she saw sale signs. Sentence 3: Julie read that all shoes were half price. Sentence 4: She went immediately to the shoe department. Sentence 5: Julie bought eight pairs of shoes. Choices: a. College. b. Shoe Shopping.
b