which of the following accurately describes of the effect of the government budget deficit on the open economy? a. real interest rates fall, which encourages domestic investment; the currency depreciates pushing the trade balance toward surplus. b. real interest rates rise, which causes crowding out of domestic investment; the currency appreciates pushing the trade balance toward deficit. c. real interest rates fall, which encourages domestic investment; the currency appreciates pushing the trade balance toward deficit. d. real interest rates rise, which causes crowding out of domestic investment; the currency depreciates pushing the trade balance toward surplus.