Probably C. because it make more sense then any other answer.
Answer:
defend each other against attacks by responding with force.
Explanation:
Under NATO, the United States, Canada, and Western European nations agreed to defend each other against attacks by responding with force.
NATO is acronym got North Atlantic Treaty Organisation that was formed to protect the freedom and safety of its member nations and weaker nations.
Under this agreement, the United States, Canada and Western European nations agreed to defend each other against attacks by responding with force.
Quite a few, in fact.
Major Cold War proxy wars included the Algerian War, the conflict in the Congo, the Northern Yemeni Civil War, the Sand War, the Western Sahara War, the Laotian Insurgency, the Civil War in Mozambique, and many others.
Answer:
If you still need help so I can
Explanation: