Will was stupefied with exhaustion, and he _____ his head on the grass under one of the trees and slept, but he saw a cat acting strangely. 

A．should have lied

B．ought to have lay

C．might have laid

D．must have laid

男，70岁。服用氟桂利嗪3个月后出现动作徐缓，僵硬，手部震颤，跌倒一次。美多芭治疗无效。查体：智能正常，面具脸，四肢肌力正常，肌张力高。最可能的诊断是（）。

A.血管性帕金森综合症

B.帕金森叠加综合症

C.药物性帕金森综合症

D.外伤性帕金森综合症

E.原发性帕金森病