Economists Describe Prices as "Signals" in a Market Economy Because

Economists describe prices as "signals" in a market economy because

A) prices are the only mechanism through which supply and demand will balance.
B) changes in these signals bring about changes in economic behaviour.
C) changes in these signals bring about changes in market structure.
D) they tell consumers how to act to keep the market system functioning well.
E) they tell government agents how to act to keep the market system functioning well.