Answer:
b. minimum price that can be legally charged for a product or service
Explanation:
A price floor represents a minimum price that can be legally charged for a product or service. A price floor is the lowest legal price that can be paid in markets for goods and services, labor, or financial capital. There are many goods which have price floors imposed by the government; for example agriculture good. In an organizations, unions may also impose price floors which could be the minimum rates for the staff etc.