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: Crystal's bank made a mistake with her account. Sentence 2: The bank deposited money into her account that wasn't hers. Sentence 3: Crystal noticed this immediately. Sentence 4: Crystal was an honest person. Sentence 5: She called the bank to inform them of the mistake. Choices: a. Crystal's Account. b. Mountain Climbing.

a