Which of the Following Is a Difference Between a Private

Which of the following is a difference between a private trial and litigation?

A) The disputants select the neutral party in a private trial, but a judge is assigned to a lawsuit.
B) Private trials need to be held with a jury, but the parties can waive their right to a jury in litigations.
C) A judge has to state the conclusions of law, whereas a referee in a private trial need not.
D) The disputants decide whether to be bound by the referee's verdict in a private trial, but not in a lawsuit.