Zimbabwe’s opportunity cost of one hairbrush is
a. 10/3 toothbrushes and Portugal’s opportunity cost of one hairbrush is 6/5 toothbrushes.
b. 10/3 toothbrushes and Portugal’s opportunity cost of one hairbrush is 5/6 toothbrush.
c. 3/10 toothbrush and Portugal’s opportunity cost of one hairbrush is 5/6 toothbrush.
d. 3/10 toothbrush and Portugal’s opportunity cost of one hairbrush is 6/5 toothbrushes.