Pareto optimality is a condition which prescribes that the welfare of one person can be improved only by reducing the welfare of at least one individual.
External sector balance reflected in the stability of the currency
d.)
Independent monetary policy by the central bank
Answer (b)
Impossible trinity is a monetary policy challenge where the central bank can’t ensure three desirables simultaneously – external sector balance, domestic balance and an independent monetary policy.
Aggregate demand is the one that creates employment and output in the economy. Investment, government expenditure and exports are components of aggregate demand. On the other hand, savings is not. Savings are influential only when they are used by investors for investment.