Which of the following actions would be considered a violation of sports ethics?

Select one:

A$.$ Two fans are removed from a collegiate baseball game after shouting racial slu an opposing team's outfielder.

B$.$ A professional golfer calls a two$-$stroke penalty upon herself for accidentally hitt and moving a loose impediment with her club.

C$.$ After a basketball player's season as a professional with Euroleague Basketball, returns to play for the University of Colorado.

D$.$ A coach suspends a football player for a severe late hit that was not observed by the officials during the game.