单项选择题

A.737-300(2);737-400(2);737-700(4);737-800(4)
B.737-300(2);737-400(4);737-700(2);737-800(4)
C.737-300(2);737-400(4);737-700(4);737-800(4)
D.737-300(2);737-400(2);737-700(2);737-800(4)