The passage supplies information for answering which of the following questions
A． From which population centers did the migration of European conquerors issue B． How did the fact that the South American natives had entered a phase of empire-building affect their resistance to the European conquest C． What system of native governance was in effect at the time of the European conquest of the Americas D． Besides superior weaponry and strategy, what other advantages did the European-Americans possess in South America E． Whose production system was superior in South America, the Europeans' or the conquered peoples