Which of the Following Is an Example of How the Nuclear

Which of the following is an example of how the nuclear Non-Proliferation Treaty (NPT) monitors compliance?

A) Officials from the International Atomic Energy Agency impose economic sanctions on North Korea.
B) Officials from the International Atomic Energy Agency inspect nuclear facilities in North Korea.
C) Officials in the Central Intelligence Agency use satellite photos to analyze possible nuclear facilities in Iran.
D) The World Trade Organization keeps track of the exchange of nuclear materials between countries.