Answer:
Marxism is a political ideology that calls for central planning of the economy.
The concept of an Informal empire<span> describes the spheres of influence which an </span>empire<span> may develop which can be said to translate into a measure of influence over a region or country because</span><span> of the extension of commercial, strategic or military interests of the </span><span>empire. In these terms, given the great economic and military power the U.S. holds in the world, it can be described as an informal empire. </span>
It's not A, as they simply aren't forced to.
It's not C, as Africa is not 'just' a colony; infact, empires and therefore colonies are no longer allowed among the UN.
D is incredibly stupid.
So, B.