Answer:
The answer is D
Explanation:
As demands for African slaves increased, especailly in the Americas due to the rise in cotton production, many African states became wealthy. Usually, the slaves that Africans sold were crimanls or people who are in debt...or most of the times just brutually captured and imprisoned. Not only that, selling slaves improved the African economy.
I believe here are the challenges:
<span>a) competition grom countries with larger economies (the strongest competitor come from United States, China, Russia, Japan, and South Korea)
</span><span>c) an aging population, ( In recent years they experienced about 77% increase in elderly population)
d) members with weak economies (Most notably is Greece which is really close to bankruptcy)</span>
Iran and Saudi Arabia have large Oil refining and Oil Shipping. So, it would be D) a and b.
