The European systems of mercantilism and free enterprise greatly increased Europeans' total wealth. Option B is correct.
Mercantilism is a system in which a country tries to amass wealth through trade with other countries, exporting more than it imports and increasing stores of gold and precious metals.
Free trade isthe opposite of trade protectionism. It consist on eliminating discrimination against imports and exports. Buyers and sellers from different economies may voluntarily trade without a government applying tariffs, quotas, subsidies or prohibitions on goods and services.