Shock Therapy refers to the rapid transition from a command economy to a market-based system, often involving sudden price liberalization and mass privatization. In many post-Soviet states, this approach led to severe hyperinflation, the collapse of state-run industries, and a drastic increase in poverty and social inequality. While intended to jumpstart efficiency, the immediate result was often a profound economic contraction and social instability, causing significant hardship for the general population.

The Soviet Union officially ceased to exist on December 26, 1991, following the resignation of Mikhail Gorbachev and the signing of the Belovezha Accords. This marked the formal end of the USSR as a sovereign state and a geopolitical entity, concluding decades of Cold War competition.

Mikhail Gorbachev became General Secretary of the Communist Party of the Soviet Union in 1985. He introduced the policies of 'Glasnost' (openness) and 'Perestroika' (restructuring) to modernize the Soviet economy and political system. These reforms were intended to revitalize socialism but ultimately contributed to the dissolution of the Soviet Union by the end of 1991.

The Communist Party of the Soviet Union held power from the October Revolution in 1917 until the dissolution of the Soviet Union in 1991. This period spans roughly 74 years, which is commonly rounded to 70 years in historical and political science contexts. The party exercised centralized control over all aspects of the state, economy, and society throughout this era.

Statement IV is considered incorrect in this context because the disintegration of the USSR significantly altered the global power structure, ending the bipolar world order. While the USA remained a superpower, the USSR ceased to exist as a unified state, making the claim that both remained powerful after disintegration historically inaccurate.

Vladimir Lenin was the central figure and leader of the Bolshevik faction that seized power in the 1917 Russian Revolution. While Karl Marx provided the theoretical foundation for communist ideology, he died in 1883 and did not participate in the revolution itself. Lenin successfully adapted Marxist theory to the Russian context.

The Presidium of the Supreme Soviet was the permanent body that acted as the collective head of state and exercised legislative powers between the sessions of the Supreme Soviet. It had the authority to issue decrees, interpret laws, and manage the administrative functions of the state, making it a central pillar of the Soviet political structure.

The Russian Revolution of 1917 consisted of two primary phases: the February Revolution, which overthrew the Tsarist autocracy, and the October Revolution, which brought the Bolsheviks to power under Vladimir Lenin. This revolution fundamentally transformed Russia from an empire into the world's first socialist state, significantly impacting global political history and the development of communist ideology.

Glasnost, meaning 'openness,' was a policy introduced by Mikhail Gorbachev in the 1980s. It was intended to increase transparency in government institutions and activities in the Soviet Union. By allowing more freedom of speech and press, Gorbachev hoped to reduce corruption at the top of the Communist Party and moderate the government's abuse of administrative power.

During the recess of the Supreme Soviet, the Council of Ministers was constitutionally accountable to the Presidium of the Supreme Soviet. The provided answer 'C' identifies the Chairman, who represented the Presidium, though the body itself held the primary oversight authority during these intervals.