Which event demonstrated that white citizens as well as black citizens recognized "no future" for apartheid?

President F. W. de Klerk set up talks between the ANC and the government.

In a national referendum, a majority of both races voted against racial separation.

The United Nations passed a resolution against racial separation and imposed sanctions.

The ANC publically protested segregation through boycotts, demonstrations, and strikes.

Question

Which event demonstrated that white citizens as well as black citizens recognized "no future" for apartheid?

 President F. W. de Klerk set up talks between the ANC and the government.

 In a national referendum, a majority of both races voted against racial separation.

 The United Nations passed a resolution against racial separation and imposed sanctions.

 The ANC publically protested segregation through boycotts, demonstrations, and strikes.

anonymous · Answer

I know it is not C.  But I can't figure out what it is.