单项选择题

海岸电台海上移动业务识别码群呼码的组成是()

A.MID X1 X2 X3 X4 X5 X6
B.0MID X1 X2 X3 X4 X5
C.00MID X1 X2 X3 X4
D.00NID X1 X2 X3 X4 X5