You will be given a definition of a task first, then some input of the task.
In this task, you're given the title of a five-sentence story, the first four sentences, and two options for the fifth sentence as a and b. Your job is to pick the sentence option that seamlessly connects with the rest of the story, indicating your choice as 'a' or 'b'. If both sentences are plausible, pick the one that makes more sense.

Title: The Game Changer. Sentence 1: Charles was about twenty years older than the kids on the court. Sentence 2: But he knew moves with a basketball they couldn't imagine. Sentence 3: During a game this summer the score was tied. Sentence 4: Charles had the ball and his team needed one basket to win. Choices: a. Charles pretended to be nervous and then sunk a jump shot! b. He decided to avoid touching it.
Output:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
a