Step 1: Overview of Perestroika and Glasnost.
Mikhail Gorbachev, the last leader of the Soviet Union, introduced the concepts of Perestroika (economic restructuring) and Glasnost (openness) in the 1980s. These reforms aimed to address the inefficiencies of the Soviet system and allowed greater political freedom and transparency.
Step 2: Analysis of options.
- (A) Mikhail Gorbachev: Gorbachev is the correct answer as he introduced these reforms in the Soviet Union.
- (B) Putin: Vladimir Putin did not introduce Perestroika and Glasnost.
- (C) Stalin: Joseph Stalin was in power before Gorbachev and did not promote such reforms.
- (D) Lenin: Lenin was the leader of the Bolshevik Revolution and did not introduce these reforms either.
Step 3: Conclusion.
Mikhail Gorbachev introduced the concepts of Perestroika and Glasnost, making the correct answer (A) Mikhail Gorbachev.