A signal D0 is connected to an input of a two-input XOR gate. If we need to let D0 pass through this XOR gate, then ( ).

A、Input a logic variable signal on the other input of this XOR gate;

B、Input a logic low signal on the other input of this XOR gate.;

C、Input a logic high signal on the other input of this XOR gate. ;

D、Leave the other input of this XOR gate unused.;

E、Input D0 signal on both two inputs of this XOR gate.