Which of the following statement is not true?

Which of the following statement is not true?

A.Flight safety is an important factor in the introduction of readback procedures

B.The readback procedures can hardly ensure an understanding in the transmission and receipt of ATC clearances and instructions

C.Readback procedures serve as a cross-check for the accuracy and correctness of the transmission and receipt of ATC clearance and instructions

D.Strict adherence to readback procedures serves as a check that the single appropriate aircraft will take action on the clearance

正确答案是B