散发性呆小症的临床特点中哪项不正确（）

A.身材矮小，躯干长，四肢短

B.低鼻梁、眼距宽、舌体宽厚、伸出口外

C.骨龄正常

D.喂养困难、腹胀、便秘

E.怕冷、低体温、四肢凉

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

—Really? She ________ 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