The correct answer is C. The outcome of the 1961 Vienna Summit was that Khrushchev demanded that American troops leave the city of West Berlin.
The 1961 Vienna Summit took place on 3 and 4 June 1961 between Nikita Khrushchev, head of government of the Soviet Union and John F. Kennedy, president of the United States. The meeting held in neutral Austria in Vienna was designed to reduce tensions between the two superpowers, that were confronting each other during the Cold War.
In this summit, Khrushchev and Kennedy dealt with two important issues regarding the Cold War: the cessation of nuclear weapons tests and the withdrawal of American troops from West Berlin.
Although there were no immediate agreements in this regard, certain accords were made upon and subsequently applied.
