Given the task definition and input, reply with output. 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'.

Sentence 1: After leaving the restaurant, Maria called her boyfriend back. Sentence 2: Maria's boyfriend said that there had been a fire at his work. Sentence 3: He told Maria that he was coming home early because of the fire. Sentence 4: Maria said she was on her way home as well. Sentence 5: Maria said goodbye and walked home to her house. Choices: a. Chase. b. Maria's Phone Call.
b