Which of the Following Best Defines Socialism

Which of the following best defines socialism?

A) An economic system that combines private ownership of property, market competition, and a government's regulation of many programs and services
B) An economic system based on private ownership of property and competition in producing and selling goods and services
C) A political system in which power is allocated solely on the basis of heredity
D) An economic system based on the public ownership of the production of goods and services
E) A political system in which the government controls almost every aspect of people's lives