An example of the implementation of perestroika in the Soviet Union would be the offering of free market incentives to Soviet citizens.
Perestroika, which means "restructuring," was a series of political and economic reforms initiated by Mikhail Gorbachev in the mid-1980s aimed at revitalizing the Soviet economy by introducing elements of market economics and reducing the central planning of the economy. This included allowing for more private enterprise and incentivizing individual initiative.
The other options you provided do not align as closely with the primary goals of perestroika.