Which of the Following Situations Is Not an Example of Market

Which of the following situations is not an example of market failure?

A) Ben's Department Store cannot charge passers-by for using the sidewalk outside the store.
B) Ben cannot afford to buy a high-end Mercedes Benz luxury car.
C) Ben's Place is the only restaurant in town, and thus he has significant power to set menu prices.
D) Ben's Industries is dumping its wastewater into the unregulated river behind the factory.