Under What Circumstances Is It Appropriate for a Judge to Issue

Under what circumstances is it appropriate for a judge to issue a judgment n.o.v.?

A) When there are no disputes as to the facts of the case.
B) When the evidence cannot support the verdict of the jury.
C) When the judge would have reached a different conclusion than the jury based on the evidence.
D) When the judgment n.o.v. is issued pursuant to a fair and impartial pretrial hearing.