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Answer:
Regular water supply has decreased
Explanation:
I am confused about your question, because neither Truman or Eisenhower were around when Vietnam was happening...
If you clarify, I might be able to answer your question
The election of Nelson Mandela as president was the 20th-century event in South Africa's history that is most closely associated with the end of apartheid.
<h3>What is the Apartheid?</h3>
An Apartheid refers to the white-ruled South Africa's Nationalist Party that contributed to the country's harsh and institutionalized system of racial segregation.
The national party came to an end in the early 1990s in a series of steps that led to the formation of a democratic government in 1994.
Read more about Apartheid
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