If the three-phase motor, shown in the illustrated schematic diagram, is running in the forward direction, which of the following actions must occur before the motor will reverse rotation?

A.Normally-closed contacts "4"-"5" must open.
B.Normally- open contacts "2"-"3" must close.
C.'L1' and 'L3' must be interchanged via the "R" contacts.
D.All of the above.