Nations around the world put pressure on South Africa to end apartheid. What type of pressure was most effective? A. encouraging civil war
B. rejecting South African immigrants
C. promising financial aid to black communities throughout South Africa
D. banning South African participation in international sports competitions

D. banning South African participation in international sports competitions

Explanation:

White South African artists were effectively banned from touring the world and non-South Africans were ostracized for performing in South Africa. Perhaps the most influential initiative was the 'sports boycott', imposed initially because of the government's rigid adherence to apartheid in sport.

d.) greenhouse gases