Final answer:
The UN's Security Council can ask its members to take military action to uphold a UN resolution,(option a) as part of its mandate to maintain international peace and security. It has 15 members, including five permanent ones with veto power.
Step-by-step explanation:
The United Nations (UN) was officially organized in 1945 to maintain international peace and security. Within the UN, the Security Council is a specialized body with significant powers, including asking its member nations to take military action in order to uphold a UN resolution. The Security Council consists of fifteen members, with five permanent members - the United States, Russia, Britain, France, and China - possessing veto power.
The primary role of the Security Council is to maintain peace by enhancing transparency, providing a forum for the peaceful resolution of disputes, and deploying peacekeepers under certain principles. It does not choose members for the General Assembly, contain Communist expansion, or negotiate agreements on trade and development.