Correct option is D
On June 26, 1945, 51 nations signed the Charter of the United Nations during the San Francisco Conference, officially establishing the United Nations (UN). These countries included major powers like the United States, the United Kingdom, the Soviet Union, and China, as well as many smaller countries. The UN was created in the aftermath of World War II to prevent future conflicts and promote international cooperation. The number of signatories grew later as more nations gained independence and joined the organization. The charter outlines the goals and structures of the UN, including maintaining international peace and security, promoting human rights, and fostering social and economic development.
