15.In the 1980s the U.S. budget deficit rose. At the same time the U.S. trade deficit grew larger, the real exchange rate of the dollar appreciated, and U.S. net foreign investment decreased. Which of these events is contrary to what the open-economy maci oeconomic model predicts concerning the eilects of an increase in the budget deficit?
(A)The U.S. trade deficit grew.
(B)The real exchange rate of the dollar appreciated.
(C)U.S. net foreign investment fell.
(D)None of the above are contrary to the predictions of the model.