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: Tina looked at her schedule. Sentence 2: One of her teachers was TBD. Sentence 3: She was rather inquisitive about it. Sentence 4: So she walked into the door. Sentence 5: Tina saw a her old teacher actually come back. Choices: a. New teacher. b. The Dream.

a