Suppose the price of petrol is expected to fall in the future. As a result, the current demand for it decreases and the current supply increases. However, the change in supply is much greater than the change in demand. Thus,
a. both the equilibrium quantity and price of petrol will increase
b. the equilibrium quantity of petrol will increase and the equilibrium price of petrol will decrease
c. the equilibrium quantity of petrol will decrease and the equilibrium price of petrol will increase
d. both the equilibrium quantity and price of petrol will decrease