The expected return on dollar deposits in terms of dollars, RD, is:
a. the interest rate on dollar deposits, iD, only when Et > E +1.
b. always the interest rate on dollar deposits, iD, for any exchange rate.
c. the interest rate on dollar deposits, iD, only when E+ < E †+1.
d. the interest rate on dollar deposits, iD, only when Et = E +1.