<span>the reservoir crew
Hope this helps !</span>
B. It was a center of trade on the Mediterranean
For more than 1000 years Constantinople was the capital of the Byzantine empire. It had an strategic position for trade, and many trading routes passed through there. It was the biggest and richest city in all of Europe.
Im not completely sure but I think its B: great forests in North Africa were destroyed. My reason for this decision is that they probably destroyed the great forests for agriculturable land.
Hope this helps!