A. Nuclear Non-Proliferation Treaty, is the correct answer.
NATO was an intergovernmental military alliance where the members agreed to defend one another in the case of an attack. The Universal Declaration of Human Rights was a 1948 declaration about what the rights human beings are entitled to. The Kyoto Protocol was a 1993 international treaty to reduce the emissions of greenhouse gases. None of these concern the disarmament and destruction of nuclear weapons.
The Nuclear Non-Proliferation Treaty was an international agreement to prevent the spread of nuclear weapons and promote the peaceful use of nuclear energy. This is the correct answer.
