Question 6 of 21 The rapid spread of devastating diseases among American Indians soon after
the arrival of Europeans was a disastrous result of
A. a lack of medical advances.
B. the African Diaspora,
C. poor nutrition,
D. the Columbian Exchange,

D . The Columbian Exchange

Explanation:

Columbian Exchange and disease

Europeans brought deadly viruses and bacteria, such as smallpox, measles, typhus, and cholera, for which Native Americans had no immunity. On their return home, European sailors brought syphilis to Europe.

d.) the area was once ocean