You will be given a definition of a task first, then an example. Follow the example to solve a new instance of the task.
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: Marcus needed clothing for a business casual event. Sentence 2: All of his clothes were either too formal or too casual. Sentence 3: He decided to buy a pair of khakis. Sentence 4: The pair he bought fit him perfectly. Sentence 5: Marcus was happy to have the right clothes for the event. Choices: a. Marcus Buys Khakis. b. Marcus Works.
Solution: a
Why? Marcus's reasons for buying khakis is established, followed by his purchase of them and reaction.

New input: Sentence 1: Peter bought a chocolate candy bar at the grocery store. Sentence 2: He forgot it in his truck on a hot day while he was at work. Sentence 3: When he returned to his truck he found the melted chocolate. Sentence 4: It hand burst the package and melted into his air vents. Sentence 5: Peter's car smelled like chocolate for a while afterwards. Choices: a. Melting Point. b. The Truth Hurts.
Solution:
a