According to the article about Soviet leader Mikhail Gorbachev, why did Gorbachev receive the Nobel Peace Prize?
A.
He sent troops into Afghanistan to put down a rebellion.
B.
He helped North Korea and South Korea settle their differences.
C.
He took important steps toward improving relations with the United States.
D.
He took important steps toward making the Soviet military so strong that the US was no longer a threat.