有关腹股沟管的解剖哪项是错误的（）

A.内口即内环，是腹横筋膜的裂隙

B.上壁为腹外斜肌弓状缘

C.下壁为腹股沟韧带和腔隙韧带

D.后壁是腹横筋膜及腹膜

E.男性内有精索，女性有子宫圆韧带

We offered him our congratulations ___ his passing the college entrance exams.

A．at

B．on

C．for

D．of