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: Don has a calculus test tomorrow. Sentence 2: He has not studied at all. Sentence 3: He decided to stay up all night and study. Sentence 4: While he was studying, he fell asleep. Sentence 5: Don was relieved when he teacher postponed the test. Choices: a. Hooks. b. Calculus test.

b