Which of the Following Resulted from the European Exploration, Conquest

Which of the following resulted from the European exploration, conquest, and colonization of the Western Hemisphere?

A) Crops new to each hemisphere reshaped people's diets and transformed the natural environment.
B) Native Americans gained an unprecedented amount of political power.
C) The Old and New Worlds remained largely unchanged.
D) European interest in Africa dissipated; instead, Europeans focused on enslaving Native American populations.
E) European nations entered the longest era of peace since the Pax Romana.