---Jenny took the 8:00 bus to Guangzhou this morning.

　 ---Really? He 　　　 the 9:00 train. It’s much more comfortable and safer to travel by train.

　 A．could have taken　　　　　　　　　　　　　　 B．should take

　 C．must have taken　　　　　　　　　　　　　　 D．can take