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: Allie bought some shares of stock. Sentence 2: She bought more than what she had. Sentence 3: She didn't realize this at first. Sentence 4: But her broker called her to tell her to deposit money. Sentence 5: Allie immediately called her bank and made the transfer. Choices: a. Too Much Hairspray. b. Margin call.

b