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: Irene needed to mail a package to her family. Sentence 2: She arrived at the post office. Sentence 3: The employees there informed her that she needed to buy stamps. Sentence 4: She was annoyed at first, but paid for the stamps. Sentence 5: They were cheaper than she expected, so she had no worries. Choices: a. Stamp. b. The School Picture.

a