Answer:
b. Soviet Union; wanted to make sure that they were able to keep control of
Eastern Europe.
I believe the answer would be the last option. A resource has value, and people are willing to pay for it most likely because the resource is scarce. When a resource is not enough or the supply is low as compared to its demand, then most likely that price or value of it would increase.
The expansion of the Islamic faith progress through the rest of the Arab peninsula took place largely "<span>b. In violent warfare as Islam challenged both polytheists and the ruling elite," since they there were challengers to the status quo that were very much disliked by the ruling class. </span>
