A Police Officer Pulls You Over and Says, "You've Been

A police officer pulls you over and says, "You've been driving 15 kilometres per hour beyond the speed limit." Following the principle of disarm the opposition, you should respond in this manner:

A) "Officer, there has been some mistake."
B) "How would you like to deal with me when you are out of uniform?"
C) "You must have been speeding in order to catch me."
D) "You're right, I was speeding."