Before the slave trade, African culture was agricultural and advanced. The African slave trade started when the leaders of European countries wanted to find new land. Slavery started for many reasons like money, greed, and high demand for labor.
"China had limited trade <span>opportunities with other civilizations, but Egypt had several" would be the best option from the list, since China was more isolated and Egypt at the Nile at its disposal. </span>
I believe your answer is " A.Constantinople".
E. winning battles at trenton and princeton