Suppose in the market for iPhones, the following two changes take place: (1) the cost of making iPhones rises and (2) customers begin to prefer Android-platform smart phones over iPhones. What happens to equilibrium price and equilibrium quantity?
A) Equilibrium price and equilibrium quantity fall.
B) Equilibrium price falls but equilibrium quantity is indeterminate.
C) Equilibrium price is indeterminate and equilibrium quantity falls.
D) Equilibrium price rises but equilibrium quantity is indeterminate.