Considering the excerpt's content, the statement that best conveys his idea that continued practice of enslavement threatens the existence of America itself is option D.
The is because the statement “that all men are created equal; that their Creator endows them with certain inalienable rights; that among these are life, liberty, and the pursuit of happiness " is the fundamental basis upon which the United States of America was established.
Therefore, if the fundamentals are not being operated upon in practical to some selected people, then there may be a danger to every ordinary American in the future and the whole country at large.
Hence, in this case, it is concluded that the correct answer is option D.
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