Correct answer:
D. Social equality will eliminate the need for government.
Historical details:
Marxism is also known by the name "communism," which is a name its founders gave to their theory. Communism was also called "scientific socialism" by its founders, Karl Marx and Friedrich Engels. The "science" of it believed it was the inevitable path of economic history.
The theory of Karl Marx and Friedrich Engels was that ultimately the workers in society would take ownership over their own labor and the means of production, and there would be social equality. All members of a society would have all in common and everything equal. There would be no private property; with all things intended to operate communally. This would ultimately eliminate the need for government.