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'.

Example input: 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.
Example output: a
Example explanation: Marcus's reasons for buying khakis is established, followed by his purchase of them and reaction.
Q: Sentence 1: Kenny was a teacher at a local school. Sentence 2: His students weren't doing as well as they should have. Sentence 3: Kenny told his students he'd give them pizza if their grades improved. Sentence 4: The children did much better on their next exam. Sentence 5: Kenny treated the children to pizza. Choices: a. Record. b. The Incentive.
A:
b