关于妊娠剧吐的相关病因下列恰当的是（）

A.绒毛膜促性腺激素水平的变化

B.黄体酮对胃肠道平滑肌的松弛作用

C.神经系统功能不稳定，精神紧张

D.与胎儿的性别有关

E.营养不良

I wrote down his name and address ______ I should forget it.

A. in order that


B. for fear that
C. so that



D. since