Data on Trade Barriers, Income Levels, and the Growth of Per

Data on trade barriers, income levels, and the growth of per capita GDP indicate that

A) there is no link between trade restrictions and either the per capita income levels or growth rates of economies.
B) countries that impose high trade restrictions have both high income levels and rapid rates of economic growth.
C) countries that impose high trade restrictions have low income levels, but they have been growing rapidly in recent decades.
D) countries that have lower trade restrictions have both higher income levels and more rapid rates of economic growth than those with high trade barriers.