if you're a United States citizen you can stay here in the United States
C. asks the benevolent social planner to step in and fix things
Export means shipping goods out of the country. This means that it depends on the country to say what was the export, one country's export in another's import.
For Europe, the export was textiles and rum,
For Africa, it was the slaves,
For America, it was sugar, tobacco and cotton.