Pretty sure it's B
Hope it helps
The reason countries promote trade is to have better economies and in turn to have more money to have a better quality of life in the country.
Explanation:
In the modern world of free trade and the globalization of all commodities it is important for nations to be prosperous to exert power on the world stage and to have a better lifestyle compared to the other parts of the world.
To make sure this happens the countries must have capital superiority, which can only be achieved by the flow of money in their economy.
This flow of money only happens when there is trade. The more trade happens inside the country and the inter country market the more the value of the money being traded.
Free land (well they had to pay like 10 cents), and gold (the gold rush).
