Which of the Following Is a Cause of Poverty at the Nation

Which of the following is a cause of poverty at the nation level?

A) The poorest nations tend to be found in warm climates, where people move more slowly and are less able to accomplish things that lead to wealth.
B) People in poorer nations are more concerned with spirituality than with material goods.
C) The poorest nations were once colonies of the richer nations, and this legacy of exploitation has left them behind in terms of leadership and economy.
D) People in richer nations are more deserving because they work both harder and smarter.