The correct option is: A combination of Internal political pressures within South Africa and pressures from the international community.
The end of Apartheid was a result of various factors, including the internal political struggles and movements within South Africa, as well as international pressure from the global community. The United Nations and other countries did play a role in imposing economic and diplomatic sanctions against South Africa, which contributed to the end of apartheid, but it was primarily the internal political movements that brought about change. The African National Congress (ANC) led by Nelson Mandela played a significant role in the struggle for liberation and in dismantling the apartheid regime.