If supply of a product increases and demand for the product decreases, equilibrium quantity will definitely change.

When the Fed raises the federal funds rate, eventually there is

A) an upward movement along the investment demand curve and the aggregate demand curve shifts leftward. B) an upward movement along the investment demand curve and the aggregate demand curve shifts rightward. C) a leftward shift of the investment demand curve and the aggregate demand curve shifts leftward. D) an upward movement along the investment demand curve and along the aggregate demand curve. E) a leftward shift of both the aggregate demand curve and the aggregate supply curve.

All else equal, when oil prices increase, people are ________ to look for oil substitutes. This will ________ the number of years it will take to deplete the stock of oil

A) discouraged; increase B) discouraged; decrease C) encouraged; increase D) encouraged; decrease