In the Expression I = I_f - ΔEX^e/EX - ^hf,d

In the expression i = i_f - ΔEX^e/EX - ^hf,d, the term ^hf,d represents

A) the currency premium.
B) the difference between the inflation rate in the home country and the inflation rate in the foreign country.
C) the average brokerage fee charged in the home country when domestic currency is exchanged for foreign currency.
D) the tax levied by the home country's government on foreign exchange transactions.