羊水栓塞导致（）

A．凝血功能障碍

B． * * 分泌物异常

C．恶变

D．下腹包块

E．输卵管破裂

For teenagers,there are always too many rules that are expected________.[      ]

A. to obey      

B. to be obeyed

C. obeying    

D. obeyed