Communism is defined as:

• A. a political theory derived from Karl Marx
• B. a political system in which the supreme power lies in a body of citizens who can elect people to represent them
• C. the process of people establishing homes, and often citizenship, in a country that is not their native country
• D. a political theory derived from Karl Marx, leading to a society in which all property is publicly owned and each person works and is paid according to their abilities and needs.

Answer: (D)

Communism is a political and economic system in which property and the means of production are owned publicly and wealth is distributed according to need, with each person contributing according to ability and receiving pay according to need. The statement that matches this description captures both the public ownership of property and the principle of distributing goods and rewards based on need. The other statements describe a different idea (a system where citizens elect representatives) or a concept like immigration, which do not define communism.