Using the United States and Japan as an example, one prominent similarity would be that both countries practice the economic system of capitalism, while a major difference would be that the United States is a heavy exporter while Japan in a heavy importer.
I think that the most likely answer is B.
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>
It increased the purchasing power of rich Americans.
