Which of the following is NOT a function of a price floor?

The correct choice highlights that stimulating competition is not a function of a price floor. A price floor is a minimum price set by the government or an authority for a particular good or service. Its primary purpose is to ensure that prices do not fall below a level that would threaten the financial viability of producers, hence protecting low-wage workers (in some contexts) and ensuring a minimum income for suppliers.

By establishing this minimum price, price floors help to maintain market stability and prevent prices from falling too low, which can occur in situations of surplus or economic downturn. Consequently, option B stands out as it does not align with the objectives of price floors; rather than encouraging competition, price floors may actually restrict it by maintaining higher prices that could bar new entrants into the market and inhibit price adjustments based on supply and demand dynamics.