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: David was driving fast down the interstate. Sentence 2: His new sports car was one of the fastest on the road. Sentence 3: David heard a noise coming from his engine. Sentence 4: He panicked and pulled over worried. Sentence 5: He opened the hood to find white smoke coming from his engine. Choices: a. Up in smokes. b. Without A Job.
a