Should the pilot of an aircraft equipped with a transponder experience a loss of two-way radio capability, he can be expected to _______ .
A.adjust his transponder to reply on Mode 3/A Code 7700 for one minute
B.after one minute setting of 7700 change to Code 7600 and remain this code for fifteen minutes or the remainder of the flight
C.repeat steps A and B as practicable
D.above all actions
正确答案是D