Answer:
b. increase the market clearing price of good X but have an uncertain impact on the equilibrium quantity of X.
Step-by-step explanation:
With respect to the market clearing price and the equilibrium quantity for good X, an increase in the demand for and a decrease in supply of the good definitely will increase the market clearing price of good X but have an uncertain impact on the equilibrium quantity of X.
Hence, an increase in the demand for goods with a decrease in its supply would make the selling price higher, thus affecting the equilibrium quantity of the goods.