Need it now explain gorbachev’s policy of glasnost. how did this policy change the soviet union?

To reform the distraught Soviet Union, the democratisation of communist party was promoted through party secretary Mikhail gorbachev's polices of perestrika and glasnost ...
Glasnost was the name for the social and political reforms to bestow more rights and freedoms upon the Soviet people ..its goal was to include more people to the political process through freedom of expression.this led to a decreased censoring of the media, which allowed writers and journalist to expose news of government corruption and the depressed condition of the Soviet people...when it fell apart citizens were not accustomed to command. the outburst of information about escalating crimes by the government caused panic ...this caused an increase in social protest in a nation used to living under the strictest government control, and went against the goals of Gorbachev

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The answer is option a. boundary line drawn by pope alexander iv in 1493.