The headquarters of the United Nations High Commissioner for Refugees (UNHCR) is located in Geneva, Switzerland. Geneva is an international city known for its diplomatic presence and is home to numerous international organizations, including the United Nations. Here is a detailed explanation of why the correct answer is option 'C':

1. The United Nations High Commissioner for Refugees (UNHCR):
The UNHCR is a United Nations agency mandated to protect and assist refugees and other displaced persons around the world. It provides humanitarian aid, promotes durable solutions, and advocates for the rights of refugees. The agency was established in 1950 and has since played a crucial role in addressing forced displacement worldwide.

2. Headquarters in Geneva:
The UNHCR's headquarters are located in Geneva, Switzerland. Geneva has a long history of hosting international organizations and has been a hub for diplomatic activities. The city offers a neutral and politically stable environment, making it an ideal location for international organizations like the UNHCR to carry out their work.

3. Geneva as an International Hub:
Geneva is often referred to as the "diplomatic capital of the world" due to the presence of numerous international organizations, including the United Nations Office at Geneva (UNOG). The city serves as a meeting point for diplomats, policymakers, and humanitarian actors from around the world. Its strategic location within Europe and its strong tradition of neutrality have made it a preferred location for international headquarters.

4. Benefits of Geneva as the Headquarters:
The choice of Geneva as the headquarters for the UNHCR offers several advantages. Firstly, it allows for close collaboration and coordination with other international organizations and agencies based in the city. This facilitates efficient cooperation and information sharing among different entities working towards common goals. Secondly, Geneva's reputation as a center for diplomacy and humanitarian work helps to attract talented professionals from diverse backgrounds, enabling the UNHCR to access a pool of expertise and experience.

In conclusion, the correct answer is option 'C' - Geneva. The UNHCR's headquarters in Geneva, Switzerland, is strategically located in an international hub known for its diplomatic presence and cooperation among various international organizations.