"...have today been given the rare privilege to be host to the nations of the world on our own soil."
Explanation:
This statement is the answer to the question because when Mandela states this, it shows that she wants to make South Africa's standards rise among other countries, and she wants the country to get more developed. This statement also describes they want to become more standarized on their own soil.
Answer: "outlawed and isolated by the peoples of the world"
Explanation:
"The national mood changes as the seasons change" is incorrect because it's not related to the idea of South Africa's place among other regions, it's talking about the internal environment.
"when the grass turns green and the flowers bloom" incorrect for same reason as above
"outlawed and isolated by the peoples of the world" is correct because it shows that they did not like their low standing and it is implied that they want to change that.
"have today been given the rare privilege to be host to the nations of the world on our own soil." incorrect on Edmentum, because this is how South Africa is beginning to realize their wish, not describing their actual wish to regain position