The correct answer is option 'B' - Washington DC.

The International Monetary Fund (IMF) is an international organization that works to promote global financial stability and economic growth. It was established in 1944 and currently has 190 member countries. The headquarters of the IMF is located in Washington DC, United States.

The IMF Headquarters in Washington DC is the main hub for the organization's operations and decision-making. Here are some key points about the IMF headquarters and its significance:

1. Location: The IMF headquarters is situated in the heart of Washington DC, at 700 19th Street NW. It is located near other important financial institutions and government agencies, making it convenient for coordination and collaboration.

2. Purpose: The headquarters serve as the central administrative and operational center for the IMF. It houses various departments, including the Executive Board, the Managing Director's Office, and other divisions responsible for policy development, research, and lending operations.

3. Decision-making: The headquarters is where major decisions regarding IMF policies, programs, and lending are made. The Executive Board, consisting of representatives from member countries, meets regularly at the headquarters to discuss and approve policies and programs.

4. Collaboration: Being located in Washington DC, the IMF headquarters allows for close cooperation and coordination with other international organizations such as the World Bank, which also has its headquarters in the same city. This proximity facilitates joint initiatives and policy coordination between the two institutions.

5. Accessibility: The IMF headquarters is easily accessible to member country officials, policymakers, and other stakeholders who frequently visit for meetings, consultations, and negotiations. Its central location and well-developed infrastructure make it convenient for international travel and communication.

In conclusion, the IMF headquarters is located in Washington DC because of the city's status as a global financial hub and its proximity to other important international institutions. It serves as the main administrative and decision-making center for the IMF, playing a crucial role in promoting global financial stability and economic growth.