With regard to various economic systems, most economists agree that

A) the mix of market and command principles that exists in Canada is the best.

B) the optimal mix of market and command systems remains constant over time.

C) most production and consumption decisions are more efficiently coordinated by markets than through central planning.

D) government intervention in the economy is only justified in time of war.

E) command economies have been very successful in distributing income in socially just ways.