Which of the Following Domestic Policies Were Initiated by Mikhail

Which of the following domestic policies were initiated by Mikhail Gorbachev and other Soviet reformers beginning in the mid-1980s,contributing to the eventual dissolution of the Soviet Union?

A) policies of both political openness and economic restructuring
B) policies of political openness but not economic restructuring
C) policies of economic restructuring but not political openness
D) Neither political openness nor economic restructuring policies were adopted; the dissolution of the Soviet Union was purely in response to U.S.actions.