Answer:
the correct answer is c. then the United States will have a comparative advantage relative to Mexico in the production of all goods.
Explanation:
If you can see, the question directly states that the mexico is less productive, this means that when the labor is used in the production of goods and services, the production of such goods become ineffective comparatively to USA as well.
So it is reasonable to conclude that the USA have comparative advantage over goods produced relatively to mexico, but this will be mainly seen in laour intensive goods.