If it is required that the coils 'R1-R2-R3' in the indicator of figure "B", turn opposite to those in the transmitter, as shown in the illustration, what action should be taken?

A.Reverse the 60 Hz supply connections to 'S1' and 'S2'.
B.No action is needed.
C.Interchange leads 'R1' and 'R3'.
D.Interchange leads 'R2' and 'R3'