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: Ethan was turning 27 that morning. Sentence 2: He was just planning on having a normal day. Sentence 3: He got off work and drove home. Sentence 4: He opened the door of his apartment and all his friends jumped out. Sentence 5: He had a good birthday, Choices: a. Frying Bacon. b. Ethan's Birthday.
b