C) an increase in Gross Domestic Product (GDP).
Increased education and training in a nation will most likely result in an increase in GDP, as people will be more prepared to contribute to the economy. Moreover, when the population of a country is well-educated, innovation and entrepreneurship rises, and the economy shifts its focus from exports of natural resources to technological and industrial innovation.
D) an amount that can legally be imported.
A quota is a type of restriction on trade. Quotas are designed to set a limit on the quantity of a good that can be imported into a country in a given period of time. Quotas are meant to protect the producers in the country from foreign competition.