What is the best definition for mercantilism?

an economic policy in which investors buy shares in a company in order to share the risks and profits
an economic policy in which countries collect gold or silver and control trade
an economic system in which individuals own businesses
an economic system in which money is put into something, such as a business, in order to make a profit

Mercantilism is an economic policy in which countries collect gold or silver and control trade

Explanation:

Mercantilism is an economic theory that advocates government regulation of international trade to generate wealth and strengthen national power. Merchants and the government work together to reduce the trade deficit and create a surplus. It funds corporate, military, and national growth. Mercantilism is a form of economic nationalism. It advocates trade policies that protect domestic industries

confederacy: supported slavery, believed states should be able to nullify federal laws, supported low tariffs

union: everything else