Answer:
The answer is: b
Step-by-step explanation:
Assuming the market for good x is competitive, that is, no consumer or producer solely influences the market; then the market for good x is in equilibrium at the point where the quantity demanded is equal to the quantity supplied. The price of good x at this point is optimal for the market and is known as the equilibrium price. A price ceiling is a price that is lower than equilibrium price, meaning that consumers would be able to purchase goods at a lower price than the equilibrium price. The equilibrium price and quantity of good x is $13 and 150 units respectively. Since the price ceiling is equal to the equilibrium price of $13, then the quantity demanded and supplied will remain fixed at 150 units which is the optimal quantity.