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: Bob was trying to fall asleep when the phone rang. Sentence 2: It was the FedEx man calling from his apartment lobby. Sentence 3: He told him he had a package for him. Sentence 4: Bob tried to control his anger and not yell. Sentence 5: He asked as calmly as possible why FedEx didn't just bring it to him. Choices: a. Lobby. b. Chameleon.

a