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: Mark wanted to increase his pitching speed over the summer. Sentence 2: He practiced nearly all day to get his pitching speed up. Sentence 3: After nearly giving up he decided to start to lift weights. Sentence 4: At the end of the summer his pitching speed increased by 10 mph. Sentence 5: He ended up being very pleased with his results. Choices: a. Scared Straight. b. Marks Pitching.

b