Well this questions is based on what you think.
Answer:
The answer is D. Secular
Explanation:
A secular community means that the religion and related aspects does not include influence the lives and the social interactions of the members in the community.
The answer is income taxes
https://socratic.org/questions/how-were-the-west-african-kingdoms-involved-in-the-slave-trade
With the development of the trans-Saharan slave trade and the economies of gold in the western Sahel, a number of the major states became organized around the slave trade, including the Ghana Empire, the Mali Empire, and Songhai Empire. However, other communities in West Africa largely resisted the slave trade.
The transatlantic slave trade began during the 15th century when Portugal, and subsequently other European kingdoms, were finally able to expand overseas and reach Africa. The Portuguese first began to kidnap people from the west coast of Africa and to take those they enslaved back to Europe
Answer: The correct answer would be B. Physical Evidence.
I hope that this helps you!