The correct answer is A. Vienna.
The International Atomic Energy Agency (IAEA) is an international organization that seeks to promote the peaceful use of nuclear energy and to inhibit its use for military purposes. It was established in 1957 as an autonomous organization under the United Nations. The IAEA’s headquarters is located in Vienna, Austria.
The IAEA has a membership of 193 countries. Its activities are carried out through a number of departments and offices, including the Department of Nuclear Energy, the Department of Safeguards, and the Department of Technical Cooperation. The IAEA also has a number of specialized laboratories, including the Seibersdorf Laboratories in Austria and the Laboratory for Safeguards Analytical Services in Monaco.
The IAEA’s work is funded by contributions from its member states. The Agency’s budget for 2022 is $3.8 billion.
The IAEA has played a significant role in the development of nuclear energy. It has helped to establish safety standards for nuclear power plants and to promote the use of nuclear energy for peaceful purposes. The IAEA has also played a role in the verification of nuclear disarmament agreements.
The IAEA has been criticized for its lack of transparency and for its failure to adequately address the issue of nuclear proliferation. However, the IAEA remains an important organization in the field of nuclear energy.
The other options are incorrect.
Option B, London, is the location of the headquarters of the International Maritime Organization.
Option C, Geneva, is the location of the headquarters of the United Nations Office at Geneva.
Option D, Washington, is the location of the headquarters of the United States Department of Energy.