How did the rulers of ghana become wealthy?
a. by mining and selling salt.
b. by developing iron-working technology.
c. by controlling the good supply.
d. by leading raids against nearby kingdoms.

I believe it's A, because they traded salt.

i believe the correct answer is option b. most eastern european nations joined nato.

though i could be wrong, option d. the eastern european nations were granted complete independence, would be another choice.

hope this ! : )

to force terrorists groups to stop attacking western targets using massive military force.