The "impossible trinity" refers to the idea that a country can simultaneously pursue only two of the three following policies: free international-capital flows, monetary policy for domestic stabilization, and a fixed exchange rate. For each of the following combinations indicate what the economy gives up by selecting the combination and why the omitted policy cannot be achieved:
a. a fixed exchange rate and free international-capital flows
b. a monetary policy for domestic stabilization and a fixed exchange rate
c. a monetary policy for domestic stabilization and free international-capital flows