Which of the following statements about supply and demand are TRUE? ( )
选项：

A:The quantity supplied of any good or service is the amount that sellers are willing and able to sell.
B:Equilibrium price is the price at which the amount producers are willing to supply is equal to the amount consumers are willing to buy.
C:Buyers and sellers both want to move the markets toward the equilibrium of supply and demand.
D:If the market price is above the equilibrium price, suppliers should raise the price.