National wealth was measured by the amount of treasure in the royal vaults. the total wealth of the world was limited. to become richer and more powerful, a nation had to make some other nation poorer through capture of its trade and colonies. this was
a. hanseatic league
b. pax romana
c. mercantile theory
d. mare nostrom

C. Mercantile Theory

Explanation:

Mercantile theory is based on economic policy to reduce the current account deficit and reach current account surplus. It aims to increase exports while decreasing imports to minimum.

out of the choices i'd say d the ability to set goals, mainly because to desire to continue you need motivation but it isn't motivation in that part, but setting goals means you have an endgame and you want to reach it which sums up motivation.