Answer:
Between the 1200 and 1450, the Sub-Saharan African region was thriving with trade.
Powerful Kingdoms such as Aksum existed in modern day Ethiopia and Sudan while other kingdoms Da'amat further south-west.
While the period was generally known for powerful Empires in Asia and the Middle East, the Sub Saharan countries were able to develop thriving trading business that included salt, agriculture products, salves etc.
Their biggest achievement was of maintaining sophisticated trading links between one another and minimal conflict.
A country's population can decline with low birthrates and high death rates, but another factor that causes a country's population to decline is emigration. Emigration is the act of leaving the native country to settle in another!
C. As compound interest includes interest on interest, and pays better than simple interest.
Hope this helps!
can you please translate to english please?