SCOTUS Has Ruled That a Judge's Failure to Ask a Defendant

SCOTUS has ruled that a judge's failure to ask a defendant if he or she knowingly and voluntarily entered a guilty plea in open court:

A) is not reversible, if there is strong evidence of the defendant's guilt.
B) is not reversible, if the defendant was represented by counsel during the entry of the plea.
C) is reversible, because the judge accepted a plea without an affirmative showing that it was freely given and the defendant knew what he or she was agreeing to.
D) may be grounds for an appeal, if the defendant can show the judge was aware the defendant was not of sound mind.