B. child laborers and D. miners
Hope this helps :)
I’m not sure this is the answer you’re looking for but!
• They create decimal system based on Hindu numerals and the zero
• Advances also made in geometry, algebra, and trigonometry.
• Astronomers built observations and measured the Earth. They also used the astrolabe, an instrument designed to measure the plot and position of stars.
Answer:
The trade routes of Ancient Africa played an important role in the economy of many African Empires. Goods from Western and Central Africa were traded across trade routes to faraway places like Europe, the Middle East, and India.
