Marianne is a professional chess player who hums audibly while playing her matches, thereby distracting her opponents. When ordered by chess officials to cease humming or else be disqualified from professional chess, Marianne protested the order. She argued that since she was unaware of her humming, her humming was involuntary and that ttherefore she should not be held responsible for it. Which one of the following principles, if valid, most helps to support Marianne's argument against the order?
A: Types of behavior that are not considered voluntary in everyday circumstances should be considered voluntary if they occur in the context of a professional chess match.
B: Chess players who hum audibly while playing their matches should not protest if their opponents also hum.
C: A person should be held responsible for those involuntary actions that serve that person's interests.
D: Of a player's actions, only those that are voluntary should be used as justification for disqualifying that player from professional chess.
Choose A, B, C or D as your solution.
D