Answer:
1. b- she has a comparative advantage in the production of cabinets.
2. d - does not change as long as trade costs are negligible.
Explanation:
If Meagan has a comparative advantage in the production of cabinets, she should build the cabinets herself because it means that she can build them at a lower cost than the local cabinet store can which means that it will cost less for her to make it than for her to buy it.
If trade costs are negligible this means that they do not change the price of the cabinets significantly so Megan can still use the same decision making criteria she used in the first scenario which means that her decision will not change.