Which organization is responsible for coordinating international efforts to address the challenges of nuclear non-proliferation and disarmament?

A. International Atomic Energy Agency (IAEA)

B. Comprehensive Nuclear-Test-Ban Treaty Organization (CTBTO)

C. United Nations Office for Disarmament Affairs (UNODA)

D. International Campaign to Abolish Nuclear Weapons (ICAN)

C. United Nations Office for Disarmament Affairs (UNODA)