Market failure means that A

The answer is B.

Market failure means that (b) resources are inefficiently allocated in the free market. In a regular market, products' prices get driven by market forces, like, demand and supply, and a shift in these forces leads to a change in the market prices. The variations create price equilibrium. Market failure is as a result of disequilibrium because of market deformity. It happens when the amount of services and goods provided is not equal to the amount demanded. The market distortion could be a result of powers of monopolies, price limits, government regulations, and the minimum-wage requirements.

For example, public goods as a cause of market failure will have the public consuming the product or service, whether it gets provided at a cost or not. Public goods are non-rivalrous and non-excludable, meaning that they get efficiently located, and they can't exclude those who do not pay for the goods. These goods create market failure in that those who fail to pay for the goods continue receiving them like those who do not pay. An example of this is police service, where every individual is entitled to the service whether he/she pays taxes or not.