Interest rates, the price level, and employment are closely interrelated concepts in macroeconomics. ?

A. Describe the cause of stagflation and explain why stagflation presents difficulties for economic policymakers.

B. Describe the factors that lead to higher and lower interest rates, and explain how these changes in interest rates affect the economy.

C. Describe the crowding-out effect, and explain how this effect impacts a nation's economy.

D. Countries often impose trade barriers against other countries. Explain how trade barriers affect both the domestic economy of the country imposing them and the global economy as a whole.