Correct Answer: B [Russia]
Mikhail Gorbachev, the last leader of the former Soviet Union from 1985 until 1991, has passed away at the age of 91.
In 1986, Gorbachev made a historic proposal to eliminate all long-range missiles held by the United States and the Soviet Union. It was the beginning of the end of the Cold War. He was also awarded the Nobel Peace Prize in 1990.