Answer:
B: Africa’s population declined, the Americas flourished with plants from Europe, and wealth flowed in the European economy.
Step-by-step explanation:
Africa's population (in some parts of it) went from 25 million people to 20 million people by the slave trade. Since "tribute" was going to Europe, then wealth flowed into the European economy. People, plants, animals, and even ideas were transferred during the 15th and 16th centuries between the and Europe. This was as a result of Christopher Columbus’s 1492 voyage to the Americas. This exchange came to be popularly known as the Columbian Exchange. But along with the material exchange, disease-carrying germs and bacteria too were transferred, resulting in widespread diseases and the death of several thousands of Native Americans. I also took it on E2020. If you need further explanation, please comment below.