Attach an image. We can’t see the actual text therefore cannot answer you question.
The answer is c, because it is clearly not an alliteration, and there is no repetition. An end rhyme is when words on the end of lines sentences rhyme with the words on the ends of other sentences; where as an internal rhyme has rhymes in the same sentence.
The importance of United Nations comes from the idea that all men are created equal and deserve the same human rights, as well as the rights to life, liberty, and the pursuit of happiness. The United Nations' job is to ensure that these liberties and freedoms are existent in the entire world, since the Declaration of Independence does not apply to all the people in the world. They prevent things like oppression and human rights violations.
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???? On whatever you just wrote