In what way has the developed world taken advantage of underdeveloped nations?

In what way has the developed world taken advantage of underdeveloped nations?
 
  A) The establishment of a dynamic informal economy based on agricultural products for export.
  B) The economic policies favored the rich to further divide the social structure of rich and poor.
  C) The foreign trade deals and the high-interest, short-term financial credits favored the developed world.
  D) The control of the narcotic drug trade and diplomatic intervention by the developed world was harsh.
  E) The economic policies favored the improvement of crop yields to boost agricultural exports.