Which two factors combined to contribute to the development of the African slave trade?
A the high death rate of indigenous people in the Americas partly due to malaria and yellow fever
B the deaths of far more northern soldiers from yellow fever and malaria compared to Confederate troops
C the development of genetic resistance to malaria and immunity to yellow fever by African people
D the Nazis’ decision to flood swamps in Italy on purpose to use mosquito-borne diseases as a weapon
E the use of pesticides in the United States to control mosquitos which had unintended effects on humans