Answer:
It legally forced them out of power and ended apartheid.
Explanation:
The main effect did the election of Nelson Mandela have on the Afrikaners was the end of apartheid legally from the country. Apartheid was a political and social system present in South Africa when National Party gained power in South Africa in 1948 and there was a White minority rule. It allowed racial discrimination against non-Whites. This system ended when the Nelson Mandela comes into power by winning election in 1990.
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