At a market price of $0.50, a __________ of apples exists. Quantity supplied is __________ . Quantity demanded is __________. Buyers will tend to __________ the price until it reaches equilibrium. a.) shortage; 1,000; 4,500; bid up b.) surplus; 4,500; 1,000; bid up c.) surplus; 1,000; 4,500; lower d.) shortage; 4,500; 1,000; lower