【单选题】Which of the statements is not true about the International Atomic Energy Agency (IAEA)?
A.
It is the world's center of cooperation in the nuclear field.
B.
It is a dependent international organization related to the United Nations system, the IAEA's relationship with the UN is regulated by special agreement.
C.
It was set up as the world's "Atoms for Peace" organization in 1957 within the United Nations family.
D.
The Agency works with its member states and multiple partners worldwide to promote safe, secure and peaceful nuclear technologies.