A synchronous generator supplies power to a synchronous motor connected directly to its terminals. The sub-transient reactance of the generator and motor on a certain kva base and the rated voltage of the machines are 20 and 100%, respectively. The current supplied by the generator is 80% of base current. The power factor at the bus is unity and the voltage is 95% of rated voltage. What is the per-unit current flowing into the fault?
A) 3.12
B) 4.32
C) 5.4
D) 6.48