The correct answer is A) improved U.S.-Soviet relations through the reduction of arms.
In 1987, President Reagan and Soviet leader Mikhail Gorbachev signed the Intermediate-Range Nuclear Forces Treaty which improved U.S.-Soviet relations through the reduction of arms.
On December 8, 1987, the two superpower leaders of the United States and the Soviet Union signed the Intermediate-Range Nuclear Forces Treaty (INF), that was a Treaty between the U.S. and the USSR that aimed on the elimination of two types of missiles; shorter-range and intermediate-range. Reagan and General Secretary Gorbachev signed the Treaty in Washington D.C., and the U.S. Senate ratified the Treaty in May 1988.