The correct answer is: "self-suficiency"
Mercantilism is a manner of conducting foreign economic policy that spread among many Western European countries between the 16th and 18th centuries. It consisted of maximizing the amount of monetary reserves, held by each country in the form of precious metals (specially gold and silver) and, on the first hand, such objective required a positive trade balance of finished goods (exports > imports). Each country had to enhance its economic power by lowering that of its competitors.
This system enhanced the interest on owning colonies, where the Western economies could obtain cheap raw materials and use them to elaborate their products more efficiently and to make their exports more competitive.