Answer: A
Step-by-step explanation:
Market failure is a situation whereby the allocation of goods in a free market is inefficient which often results in a net loss of economic value. It is a scenario where individuals self interest leads to inefficient outcomes. Government intervene in the market as a result of market failure. An unrestrained market which isn't controlled by the government will result into few or much goods being uses for a particular economic activity.
The main forms of market failure are market control, public goods, imperfect information and externalities.