When Prices Are Determined in a Free- Market System

When prices are determined in a free- market system

A) firms respond to changes in the economy mainly by altering the wage rate.
B) changes in the economy can be foreseen by officials.
C) supply shifts, caused by price changes, coordinate all necessary changes in the economy.
D) resources are allocated without conscious central coordination.
E) demand shifts, caused by price changes, coordinate all necessary changes in the economy.