The correct answer is C. Russia, Ukraine and Byelorus.
The Commonwealth of Independent States (CIS) is a political and economic union of 15 former constituent republics of the Soviet Union. It was established on December 8, 1991, by the leaders of Russia, Ukraine, and Belarus. The CIS was originally intended to be a loose confederation of states, but it has since evolved into a more integrated organization.
The CIS has its own parliament, the Supreme Council, and its own court, the Court of Justice. The CIS also has a number of specialized agencies, such as the Interstate Economic Committee and the Interstate Statistical Committee.
The CIS has been criticized for being a weak and ineffective organization. However, it has played a role in maintaining stability in the post-Soviet region. The CIS has also been involved in a number of economic and social projects, such as the development of a common market and the promotion of trade.
The CIS is a controversial organization. Some people believe that it is a necessary tool for maintaining stability in the post-Soviet region. Others believe that it is a relic of the Soviet Union and that it should be disbanded.
The CIS is a complex organization with a long and troubled history. It is difficult to say whether the CIS will be successful in the long run. However, it is clear that the CIS plays an important role in the post-Soviet region.
The other options are incorrect because they do not include Russia, Ukraine, and Belarus.