Refer to the exhibit. Give this output for SwitchC, what should the network administrator's next action be?()<br /> <img src="https://nimg.ppkao.com/2018-07/zhanglijun/2018072409443229245.jpg?sign=354f39aa99ea77fa56061063ec93b576&t=62d3d886" />
A、Check the trunk encapsulation mode for SwitchC's fa0/1 port.
B、Check the duplex mode for SwitchC's fa0/1 port.
C、Check the duplex mode for SwitchA's fa0/2 port.
D、Check the trunk encapsulation mode for SwitchA's fa0/2 port.