Karl Marx Studied the Development of Capitalism in Western Europe

Karl Marx studied the development of capitalism in Western Europe and the United States.One possible criticism of his research might be that:

A) his perspective was not sufficiently global in outlook
B) he ignored working class experience
C) he did not understand that societies develop through classes in struggle
D) his research was never used with the goal of improving society; instead, he simply tried to describe the world
E) Marx never bothered to really understand the production of goods