The important natural resource in West Africa that the Songhai Empire controlled was salt.
A.) Salt mines in the sahara desert is the answer.
Evidence of attacks have been found
This what i found hope this helped. if not let me know
C) he explored parts of Canada for England who is rulers use his trip to claim much of North America
Answer: For most of the Middle Ages, the Roman Empire was unquestionably the most politically and militarily powerful country in all of Europe.
Explanation: I hope this is right