The answer is C
I hope i helped and got the write answer :P
Answer:
Monsoon winds made trading across the Indian Ocean easier because they made trading more predictable and less dangerous. Without the monsoons when people could only rely sails and ors there was the possibility that their goods wouldn't make it on time and would go bad, or that the ship we sink.
Answer: Ghana, Mali, and Songhai were powerful kingdoms that ruled West Africa by dominating saltgold trade routes.
Explanation:
The last two seem right to me
Its a first source
Because it was written in that time and it showed original thinking and she was there first hand.