Answer:
The correct order is:
iv. The Population Registration Act was signed.
ii. The Soweto Uprising sparked more protests.
iii. Frederik W. de Klerk brought about reforms.
i. Nelson Mandela became the nation’s president.
Step-by-step explanation:
The Population Registration Act was an act of the Parliament that required all the people in South Africa to be registered and classified according to their racial characteristics. This act, which entered into force on 7 July 1950, was one of the pillars of the racial segregation system known as apartheid.
The Soweto Uprising was a mass protest started by black South African students on 16 June 1976, over their rejection of the introduction of Afrikaans as the language of instruction in schools. The protests were met with force by the South African government. It is estimated that at least 176 people were killed by the police.
Frederik W. de Klerk (1936-) was the last president of apartheid South Africa (1989-1994). During his term, he brought a series of reforms that ended with the dismantling of the apartheid system.
Nelson Mandela (1918-2013) was the first black president of South Africa (1994-1999). After 27 years in prison, he was freed by the de Klerk government, and got elected as president in the first open, multiracial elections in South Africa in 1994. He oversaw the dismantling of the apartheid system and the transition towards an integrated country.