The correct answer is B. European diseases devastated the Americans and in essence was a destructive weapon against the native peoples.
Explanation
During the conquest of America, an event called demographic catastrophe is manifested, which refers to the decline of the Native American population by the arrival of the Europeans, who brought diseases such as the flu, smallpox, cholera, and thypus, epidemics and plagues of Europe that caused the Native Americans to die because they had never suffered from such diseases before and did not have the necessary resistance to these diseases. One of the plagues that helped the spread of diseases were the rats that bit the Indians and transmitted the diseases and infections that were fatal to them. So, the correct answer is B. European diseases devastated the Americans and in essence was a destructive weapon against the native peoples.