I think its D. But it might be C so look at it and pick witch one makes the most since.
The Soviet Union was geographically huge stretching across Phil's classroom wall map and it consisted of Russian Federation which occupied the largest part, 15 Soviet Republics, for example, Uzbekistan, Kazakh SSR, Georgian SSR, Armenian SSR, Estonian SSR and seven satellite countries in Eastern Europe i.e. Germany, Hungary, Poland, Czechoslovakia, Romania, Bulgaria and Albania which are now independent countries.
Generally speaking, unequal distribution of wealth means that land and money are controlled by a small few, who usually have control over these things because they've manipulated the legal system in a way that favors them.