The Apartheid was the oppressive system that you speak of. They used many different systems to segregate and oppress the people of South Africa.

Tsar Alexander II initiated a series of importantreforms in Russia. During his reign, the country's rail and communication networks were improved, resulting in increased economic activity and the development of banking institutions.
Answer:
A. By seeking a direct vote from the people for its ratification
Explanation:
The ratification of the new constitution was made much easier as the people had a say in it because it required a direct vote from them.
Therefore, the correct answer is option A
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