The section "The Necessary Resources" introduces the idea that communism was a reaction to capitalism. The section "Karl Marx And Communism" develops this idea by (A)explaining how Marx believed the goals of communism would fix the problems of capitalism.(B)describing where Marx studied capitalism to research ideas for his book on communism.(C)explaining why Marx thought capitalism made rich people richer and hurt workers.(D)describing who Marx inspired to follow the ideas in his new system called communism.