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: Linda was driving down the road. Sentence 2: She heard her car start making a noise. Sentence 3: Linda was so worried. Sentence 4: She pulled into a gas station. Sentence 5: Her fears were confirmed when her engine was smoking. Choices: a. Chemistry Calamity. b. Linda breaks down.

b