A Trial Judge Would Commit Error If She Made Which

A trial judge would commit error if she made which of the below statements to a defendant in a criminal trial?

A) If he demands a jury trial, his fine will include the jury costs.
B) He should not plead guilty if there is any doubt in his mind regarding the charge.
C) He should not plead guilty unless he understands the maximum punishment.
D) He does not have the right to demand a trial by judge alone in a serious case.