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: Ben came off the bus. Sentence 2: Since he had 3 minutes to reach his physics class on time, he ran. Sentence 3: He managed to get into the building with the classroom. Sentence 4: The professor walked in and closed the door. Sentence 5: When Ben tried to knock, he ignored him. Choices: a. Car Race. b. Too Close.

b