Assume a society can produce either olives or grapes. If the marginal rate of transformation of bushels of olives into bushels of grapes is 0.2, then the opportunity cost of grapes is
◦ the 5 bushels of olives that must be forgone.
◦ the 5 bushels of grapes that must be forgone.
◦ the 0.2 bushels of olives that must be forgone.
◦ the additional 0.2 gallons of olives that can be produced.