A decrease in U.S. interest rates leads to Select one: a. an appreciation of the dollar that leads to smaller net exports. Ob, an appreciation of the dollar that leads to greater net exports. O c. a depreciation of the dollar that leads to smaller net exports. O d. a depreciation of the dollar that leads to greater net exports. The AD curve slopes Select one: O a. upward due to the wealth and substitution effects. O b. downward due to the wealth and price effects. O c. downward due to the wealth and substitution effects. O d. upward due to the price and substitution effects. Tax cuts aimed at businesses can stimulate Select one: O a. social spending. O b. investment spending. O c. net exports. O d. private consumption. The marginal propensity to consume is the Select one: O a. total amount of disposable income consumed O b. fraction of a change in disposable income that is consumed. O c. fraction of total disposable income consumed d. fraction of GDP consumed