Which of the following describes the Supreme Court's stance on when a defendant has the right to a trial by jury?

a. Defendants in any criminal prosecution have a right to be judged by an impartial jury, regardless of the seriousness of the offense.
b. Any defendant accused of a serious criminal offense punishable by six months or more of imprisonment has a right to a trial by jury.
c. All defendants appearing in any court have a right to trial by jury unless they are enemy combatants detained during a time of war.
d. Any defendant accused of a serious criminal or civil offense punishable by one year or more of imprisonment has a right to a jury trial.

b