Some demand curves have constant elasticity everywhere

A country has a comparative advantage in the production of a good if it can

A) trade off producing the good for another good. B) produce more of the good than another country. C) produce the good on and remain on its production possibilities frontier. D) produce more of the good most efficiently. E) produce the good at the lowest opportunity cost.

Refer to Figure 3-5. At a price of $10, the quantity sold

A) is 2 units. B) is 4 units. C) is 6 units. D) is 8 units.