Tariffs or other restrictions would be a barrier to
A. free trade.
B. the Monroe Act.
C. imperialism.

The most common barrier to trade is a tariff–a tax on imports. Tariffs raise the price of imported goods relative to domestic goods (good produced at home). Another common barrier to trade is a government subsidy to a particular domestic industry. Subsidies make those goods cheaper to produce than in foreign markets.

Explanation:

d will be ur answer

to mark sum 1 brainliest there has to be 2 answer at least

b) the confederacy had to pay all union war expenses.