4. Assume that the euro's interest rates are higher than U.S. interest rates, and that interest rate parity exists. Which of the following is true? A) Americans using covered interest arbitrage earn the same rate of return as Germans who attempt covered interest arbitrage. B) Americans who invest in the U.S. earn the same rate of return as Germans who a covered interest arbitrage. C) Americans who invest in the U.S. earn the same rate of return as Germans who invest in Germany D) A and B E) None of the above