Suppose two countries E and F use many inputs. Country E exports tractors and imports televisions. Assuming there are no economies of scale, which of the following statements is true?
a) If the countries did not trade, then E would have a lower opportunity cost for tractors.
b) Even though there is trade, E has a lower opportunity cost for tractors.
c) E is sure to produce no televisions while F is sure to produce no tractors.
d) Neither country can consume at a point outside its production possibility frontier.