A black market is A. a market in which buying and selling take place at prices that violate government price regulations. B. very similar to a​ "gray" market except that the goods and services exchanged are imported. C. a market in which all transactions involve activities​ (such illicit​ drugs, prostitution,​ etc.) many in the population find morally offensive. D. a market in which buying and selling take place at prices consistent with government price regulations.