Answer:
Biological warfare was a new development and not intended for mass eradication of native people.
Step-by-step explanation:
Small pox, which had killed thousands of Europeans for centuries, was now still carried by Europeans. While no longer always lethal to its carriers as they traveled to foreign lands it was still a powerful disease to those who were not immune. Therefore, unlike the Europeans, inhabitants of these new lands had never been able to build-up an immunity to this deadly disease. While never intentionally introducing biological warfare Europeans did use its overcome to establish empires.
Also, I took the quiz.