The effect of an export tariff on a large country is to ________ the terms of trade

If income increases we know for sure that the:

a. demand curve will shift to the right b. demand curve will shift to the left c. demand curve will stay the same since only price affects it d. supply curve will shift to the right e. none of the above

"Trade is generally harmful if there are large disparities between countries in wages."

A) This is generally true. B) This is generally false. C) Trade theory has nothing to say about this issue. D) This is true if the trade partner ignores child labor laws. E) This is true if the trade partner uses prison labor.