A. A decrease in the price of iPhones causes a decrease in the quantity of iPhones cases
B. A decrease in the price of iPhones causes no change in the quantity of iPhones demanded
C. An increase in the price of iPhones cases
D. An increase in the price of iPhones causes a decrease in the quantity demanded
Explanation: : price and quantity demand of any good and service are inversely related to each other. When the price of a product increases, the demand for the same product will fall.