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: The teacher introduced us to a new chapter in the book. Sentence 2: He spoke too fast since the chapter was extremely long. Sentence 3: After a half an hour, the whole class became confused. Sentence 4: Some students decided to leave early. Sentence 5: Although I was lost, I tried to remain in class and ask questions. Choices: a. Stressful Lecture. b. Spanish.

a