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: During class, the professor reviewed the material fast. Sentence 2: As a result, I started to fall asleep during class. Sentence 3: Since I sat in the front, the teacher immediately noticed. Sentence 4: He tried waking me up. Sentence 5: I received a small warning in order to remain awake. Choices: a. Early Nap. b. Linda has car trouble.

a