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'.
Q: Sentence 1: Sal is driving his friends to a concert in a big city. Sentence 2: He checks the car's tires gas and oil before leaving. Sentence 3: While driving to the concert he hears a ticking noise. Sentence 4: The car then begins to blow out smoke from the front. Sentence 5: Sal's has to pull the car over and get help. Choices: a. Driving an RV. b. Sal breaks down.
A:
b