Answer: Option (a) is correct.
Step-by-step explanation:
Correct Option: A decrease in the money supply and a decrease in government purchases.
If US goods and services are more desirable for foreigners then the exports of united states increases. Therefore, the earnings from the exports increases and hence, there will be more money in the market which increases the money supply in an economy.
So, the fed uses the Contractionary monetary policy and fiscal policy to offset the resulting change in output.
∴ Contractionary monetary policy will results in decrease in the money supply and Contractionary fiscal policy will results in decrease in government purchases.