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: Mary was going through her closet and couldn't find anything to wear. Sentence 2: She needed a new dress for her date that weekend. Sentence 3: So Mary decided to go to the local mall and do some shopping. Sentence 4: Mary went to a few stores and tried on several dresses. Sentence 5: After spending most of the day shopping, she finally found the dress! Choices: a. Step Life. b. Shopping.

b