Which of the Following Is Correct About

Which of the following is correct about?

A) There is a general consensus that command economies are more efficient than market economies because a centralized government can consider a wider range of economic factors when decisions are made.
B) In recent years,more and more countries have rejected communism and embraced more market-based economies.
C) Socialism is the most extensive command economic system because government owns all the major industries.
D) Support for a free market economy is strongest in North Korea.
E) All of these are correct.