What does USSR stand for? Select one answer: Union of Soviet Socialist Republics United Soviet Socialist Republics Union of Socialist Soviet Republics United Socialist Soviet Republics

The correct answer is: Union of Soviet Socialist Republics.<br /><br />The USSR stands for the Union of Soviet Socialist Republics. It was a socialist state that existed from 1922 to 1991, comprising multiple republics including Russia, Ukraine, and Belarus. The USSR was a one-party state governed by the Communist Party, with its official ideology being Marxism-Leninism.