Why was the UN principle of self determination important for anti colonial movements?

Correct answer: It gave an international basis to demand the right to self rule

The direct answer is A: self-determination gave anti-colonial movements an international basis for demanding self-rule. The principle says that a people should have a voice in choosing its political status and government. This gave colonized peoples moral and diplomatic support, although international practice was sometimes uneven. A is correct. B is wrong because the principle challenged permanent colonial rule. C is wrong because it did not legalize the slave trade. D is wrong because it supported, rather than stopped, legitimate freedom demands. Memory cue: self-determination means peoples choose their own government.