Answer:
Answer is option a, i.e. an increase in demand.
Step-by-step explanation:
When the price floor is imposed on a given good which is found to be above the equilibrium price, the situation of surplus arises as the supply exceeds the demand. In this situation, in order to reduce the size of the surplus, the demand has to be increased. Therefore, the answer is option a, i.e. an increase in demand.