The answer is A, Northern Europe
The mountain men era ended because the beaver was almost drove to extinction in that area and because of fashion. Yes, the change of fashion caused the mountain men era to end. Afterward though many of them became a guide for that area since they had lived there for while.
Mercantilism consisted of lowering imports and increasing exports.
The system of mercantilism was developed mostly by the Dutch and carried on in their colonies, especially those in America.
Exports were goods that other countries needed, and so those needed to be increased.
Imports were goods that your country needed, and so those needed to be kept to a minimum.
An entirely self-sustaining country could be achieved with a high export rate, which would increase their wealth, measured at that time in gold.
No because that would give the president too much power and our government was created to not have that problem.