According to the Text, a Principal Difference Between Karl Marx

According to the text, a principal difference between Karl Marx and Max Weber
Was that

A) Marx argued that there would ultimately be four classes.
B) Weber believed that there would be a middle class that controlled some power.
C) Marx was concerned about political power and inherited social status.
D) Weber was concerned only about who controlled the means of production.
E) Weber did not discuss wage earners at all.