Those were the graduate assistants ______ to do the research work in the lab.

A．to whom it was their responsibility

B．whose responsibility there was

C．whose responsibility was

D．of whom with the responsibility

下列并发症中，哪项可能性大

A．喉返神经损伤

B．喉上神经损伤

C．切口内出血

D．甲状腺危象

E．甲状旁腺损伤