Suppose that the equilibrium price of French fries rises while the equilibrium quantity falls. The most consistent explanation for these observations is:

A.a decrease in demand for French fries with no change in supply.

B.a decrease in the supply of French fries with no change in demand.

C.an increase in demand for French fries with no change in supply.

D.an increase in the supply of French fries and an increase in the demand for French fries.

正确答案：a decrease in the supply of French fries with no change in demand.