The correct answer is: 11.
The Trusteeship Council was established by the United Nations Charter in 1945 to oversee the administration of 11 Trust Territories, which were territories that had been placed under the administration of a trusteeship agreement between the United Nations and one or more of its Member States. The Trust Territories were all former colonies of European powers that had been defeated in World War II.
The Trusteeship Council was responsible for ensuring that the Trust Territories were administered in the best interests of their inhabitants and that they were prepared for self-government or independence. The Council also supervised the economic and social development of the Trust Territories.
The last Trust Territory, Palau, gained independence in 1994. The Trusteeship Council was dissolved in 1994, having successfully completed its mission.
Here is a brief explanation of each option:
- Option A: 11. This is the correct answer. There were 11 Trust Territories under the Trusteeship Council.
- Option B: 12. This is incorrect. There were 11 Trust Territories under the Trusteeship Council.
- Option C: 13. This is incorrect. There were 11 Trust Territories under the Trusteeship Council.
- Option D: 15. This is incorrect. There were 11 Trust Territories under the Trusteeship Council.