Which statement identifies the central idea of the text? a Communism has been used to increase a leader’s power and keep the lower class in powerless positions. b While communism and capitalism have both proved to be imperfect systems, both have provided people with power. c Modern communist countries have proven that it is impossible to provide every citizen with equal goods and resources. d By fulfilling Karl Marx’s true vision of communism, citizens and their economy would no doubt thrive.