Answer:
C. Country Y will import Country X's lumber due to comparative advantage
Step-by-step explanation:
In economics, comparative advantage may be defined as the ability of a person or any organisation to perform an economic activity or produce a certain product more effectively and efficiently than other activity or product. The person or organisation who has a comparative advantage in a particular product will consume less and will produce more of the product for having an comparative advantage for that produce.
Thus in the context, Country X produce lumber more efficiently that Country Y. Country X have a comparative advantage for lumber produce than Country Y. So, due to Country Y will import lumber from Country X because Country X has a comparative advantage in the production of lumber.
Therefore the correct option is -- (C)