The correct answer is: A. 1967
The Nuclear Non-Proliferation Treaty (NPT) is an international treaty aimed at preventing the spread of nuclear weapons and weapons technology. It was opened for signature on July 1, 1968, and entered into force on March 5, 1970. The NPT has three main pillars: non-proliferation, disarmament, and the peaceful uses of nuclear energy.
The NPT is a landmark treaty that has played a significant role in preventing the spread of nuclear weapons. It has also helped to promote the peaceful uses of nuclear energy. However, the NPT has not been without its challenges. One of the biggest challenges has been the failure of the nuclear-weapon states to fulfill their disarmament obligations.
Despite these challenges, the NPT remains an important instrument for nuclear non-proliferation and disarmament. It is a cornerstone of the international nuclear non-proliferation regime, and it has helped to prevent the spread of nuclear weapons to more countries.
The other options are incorrect because:
- Option B: 1970 is the year when the NPT was ratified by the United States.
- Option C: 1971 is the year when the NPT was ratified by the Soviet Union.
- Option D: 1974 is the year when the NPT was ratified by China.