A-The Soviet Union collapsed from economic struggles and Gorbachev opened relations with the U.S.
Explanation:
In 1985, Gorbachev announced that the Soviet economy had stopped and that reorganization was needed. Gorbachev and Reagan met in Reykjavik to discuss reducing mid-range nuclear weapons in Europe.
This led to the signing of the 1987 Mid-Range Nuclear Missile Agreement.
In February 1988, Gorbachev announced the withdrawal of Soviet forces from Afghanistan.
