What is the role of the United Nations?

The role of the United Nations is primarily to promote international cooperation and peace. Established after World War II, the UN aims to foster an environment where nations can work together to resolve conflicts, address global challenges, and discuss issues of common interest. By facilitating dialogue among member states, the organization helps to prevent conflicts and encourages diplomatic solutions.

Option B conveys this core purpose effectively, highlighting the UN's mission to enhance cooperation and maintain peace through various means, including diplomacy, negotiation, and support for humanitarian efforts. The UN also plays a significant part in international law and human rights, further contributing to its overarching goal of promoting a stable and peaceful global community.

Other options suggest roles that the UN does not typically engage in. For instance, governing all member countries misrepresents the UN's function, as it works on a consensus basis without authoritative power over nations. Similarly, while the UN can call for enforcement of its resolutions, it does not have the power to enforce laws among nations directly. Providing military support to all countries is also inaccurate; while the UN does have peacekeeping forces, their deployment is contingent on the consent of member nations and does not equate to providing military support broadly.