Mikhail gorbachev's "perestroika" called for
the u. s. disarmament of nuclear weapons
"openness" in political and economic affairs
economic and political restructuring
tighter governmental controls in the soviet union

Mikhail Gorbachev's "perestroika" called for economic and political restructuring. The correct option among all the options that are given in the question is the third option. This is one policy that is also considered as a reason for the breaking up of the erstwhile Soviet Union. I hope the answer helps you.