If the dollar interest rate is 10 percent, the euro interest rate is 12 percent, then A) an investor should invest only in dollars if the expected dollar appreciation against the euro is 4 percent. B) an investor should invest only in euros an investor should invest only in dollars if the expected dollar appreciation against the euro is 4 percent. C) an investor should be indifferent between dollars and euros an investor should invest only in dollars if the expected dollar appreciation against the euro is 4 percent. D) an investor should invest only in dollars. E) an investor should invest only in euros.