The famous scientist             for about two months. [ ]

A. have died

B. has died

C. has been dead

D. died

下面对美国独立战争和南北战争相同点的归纳，不正确的是[ ]

A．引起战争的经济原因都与英国有关

B．战后有利美国经济发展

C．前者以争取国家独立为目标，后者以维护国家统一为旗帜

D．都是由当时的美国总统领导资产阶级革命