The Presence of Price Controls in a Market Usually Is

The presence of price controls in a market usually is an indication that

A) an insufficient quantity of a good or service was being produced in that market to meet the public's need.
B) the usual forces of supply and demand were not able to establish an equilibrium price in that market.
C) policymakers believed that the price that prevailed in that market in the absence of price controls was unfair to buyers or sellers.
D) policymakers correctly believed that, in that market, price controls would generate no inequities of their own.