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: David is very competitive. Sentence 2: He always tries to beat everyone he competes with. Sentence 3: One day, David's brother challenges him to a game of chess. Sentence 4: David lost the chess match to his brother. Sentence 5: Now, David tries to be less competitive and more understanding. Choices: a. Competition. b. Tim's Career.

a