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: Ashley didn't know what to be for Halloween. Sentence 2: She decided to ask her mom. Sentence 3: Her mom said she should make her costume. Sentence 4: Ashley found an old sheet. Sentence 5: Ashley made a fabulous ghost costume out of the sheet. Choices: a. Everyone Just Asked if it Was Spooky. b. Halloween.
b