Concept:The Chagos Archipelago was a disputed territory between the United Kingdom and Mauritius. In late May 2025, the UK signed a treaty transferring sovereignty of the islands to Mauritius.
Explanation:In 1965, the UK separated the Chagos Archipelago from Mauritius before Mauritius gained independence in 1968, creating the British Indian Ocean Territory (BIOT).
In 2019, the International Court of Justice (ICJ) ruled that the UK’s occupation of the archipelago was illegal and that the territory should be returned to Mauritius.
In late May 2025, the UK and Mauritius formally signed a treaty transferring sovereignty of the Chagos Archipelago to Mauritius.
The treaty allows the United States to retain access to the Diego Garcia military base under a long-term lease, ensuring strategic continuity.
This agreement resolves a long-standing colonial dispute and follows the ICJ’s advisory opinion supported by the United Nations General Assembly.
Thus, the two countries that signed the treaty were the United Kingdom and Mauritius.
Answer:UK and Mauritius (Option C).