李某，女，20岁，非常害怕猫，见到猫就出汗，心跳加速，慌忙躲避，被诊断为恐惧症。医生采用放松技术与适当刺激相结合的方法，帮助李某逐渐由能够观看小猫，到接近小猫，到触摸小猫，这种循序渐进消除敏感行为的方式为（）

A.系统脱敏法

B.厌恶法

C.示范法

D.强化法

E.消除法

----Thank you very much for giving me a hand when I was in trouble.

------Don’t mention it. I only did what anyone else _______ in my place.  

A．must do

B．might do

C．would have done

D．can have done