What was the cause of the bolshevik establishment of the union of soviet socialist republics?
a. after victory in the russo-japanese war, russia had gained a significant amount of new territory.
b. revolutionary leader vladimir lenin promised to solve russia’s economic problems through communism.
c. the red army had sided with revolutionaries, and a new military and political system had to be established.
d. white army leader alexander kerensky signed a peace treaty with the allied powers.

The quote below is an excerpt from the charter of the united nations: "the purposes of the united nations are: to maintain international peace and security, and to that end: to take effective collective measures for the prevention and removal of threats to the peace, and for the suppression of acts of aggression or other breaches of the peace, and to bring about by peaceful means, and in conformity with the principles of justice and international law, adjustment or settlement of international disputes or situations which might lead to a breach of the peace . " source:this section implies that the united nations is prepared to do what to keep world peace?