Answer:
C. equilibrium quantity and price to fall.
Explanation:
Equilibrium of price is the intersection of demand and supply curve at a price, which mean quantity demanded is equal to quantity demanded. There is shift in demand or supply curve due change in various factor, like price, income, customer´s preference, technologies etc. If market reachs below equilibrium price then there will be higher demand and low supply in the market. Shift in demand and supply curve lead to increase or decrease in equilibrium price and quantity. If demand curve shift downward, which means there is decrease in quanity demanded and supply does not change, which lead both equilibrium price and quantity to fall.