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: Aaron was a high school teacher. Sentence 2: He had just given an exam. Sentence 3: Aaron started to grade the exams. Sentence 4: All the the students failed the exam. Sentence 5: Aaron assumed he didn't cover the material enough and gave a new exam. Choices: a. The Failing Exam. b. The Scrapbook.

a