What is the purpose of the document

to condemn South Africa’s actions in the Sharpeville massacre

Explanation:

The Security Council,

Having considered the complaint of twenty-nine Member States contained in document S/4279 and Add.11 concerning “the situation arising out of the large-scale killings of unarmed and peaceful demonstrators against racial discrimination and segregation in the Union of South Africa”. . . [d]eplores the policies and actions of the Government of the Union of South Africa which have given rise to the present situation.

the answer would be:

b. race

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