The use of fast acting relays and circuit breakers for clearing a sudden short circuit on a transmission link between generator and the receiving end bus improves the transient stability of the machine because

A)     Short circuit current becomes zero

B)      Post-fault transfer impedance attains a value higher than that during the fault

C)      Ordinate of the post-fault power-angle characteristic is higher than that of during fault characteristic

D)     Voltage behind the transient reactance increases to a higher value