Answer:
C. reaction formation
Explanation:
Based on the information provided within the question it can be said that this scenario is describing the term known as reaction formation. This term refers to a defense mechanism in which an individual deals with certain emotions and impulses by exaggerating the direct opposite of that tendency. Such as the individuals in this scenario.
It was the main exhibit of the Paris Exposition 1889
Because the Europeans had already been exposed to the diseases and had built an immunity to it, and the Native Americans hadn't, hope this helps
