Which of the Following Is an Example of Extended Deterrence

Multiple Choice

Which of the following is an example of extended deterrence?

A) The United States threatened to attack Moscow if the Soviet Union attacked West Germany.
B) The United States threatened to retaliate with nuclear weapons if the Soviet Union attacked New York.
C) West Germany threatened to attack East Germany if the Soviet Union tried to block the railroads and highways connecting West Germany to West Berlin.
D) France obtained its own nuclear weapons,so that it could retaliate if the Soviet Union attacked Paris.
E) China threatened to attack if the United States entered China from North Korea.