According to the passage, European conquerors had which of the following advantages in North America
A． They possessed a larger population to replace casualties in their conquest of North America than they did in the South. B． They had already gained experience in the Southern conquest that was not formerly available. C． They had access to weaponry superior to that which was employed in the Southern conquest. D． They were confronted by an opponent experienced in empire-building in North America. E． They had better martial organization in North America than they had in South America.