Question

only a minority of americans agreed with marx’s notion that in a class - free society there would be
no proletariat.
no socialism.
no war.
no industry.

Explanation:

Marx's theory on class - free society (communist society in his ideas) posits that in a class - free society, the proletariat (the working class, a product of class - based capitalist society) would not exist as class distinctions are eliminated. Socialism is a transitional stage towards a class - free society, so the idea of "no socialism" in a class - free society goes against Marx's concepts. Marx's view on a class - free society doesn't center around the absence of war or industry in that direct way as the first option.

Answer:

A. no proletariat