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: Morgan felt sick. Sentence 2: Her new car had been hit on the street! Sentence 3: The other person didn't leave a note. Sentence 4: She had to call her insurance company to file a claim. Sentence 5: She was very angry about the hit and run! Choices: a. The Car. b. The Train is Cheaper.
a