Why is a random sample important in polling?

The powers granted to the national government in Articles I, II, and III of the Constitution are known as which of the following?

a. delegated powers b. reserved powers c. implied powers d. concurrent powers e. concentrated powers

Which statement best explains why Karl Marx believed that capitalism is a system built on exploitation?

a. Capitalists must rely on salaried experts to manage their enterprises. b. Under capitalism, new enterprises are operated by people who were once oppressed. c. Capitalist enterprises would not be profitable without government support and protection. d. In a capitalist society, the people who do productive work do not enjoy the full fruits of their labor.