Charles' family is going to his favorite amusement park on Saturday. His soccer team has a game that morning, and he is supposed to be one of the starters. If Charles chooses to go to the game, he gives up the chance to go to the amusement park.

Not going to the amusement park with his family is the __________ of going to the game.
A.
benefit
B.
incentive
C.
punishment
D.
opportunity cost