C. That all men are equal is your answer.
To find out, read the whole sentence:
"<em>We hold these truths to be self-evident, </em>that all men are created equal<em>, that they are endowed by their Creator with certain unalienable Rights, that among these are Life, Liberty and the pursuit of Happiness.</em>"
Note that answer C is found inside the quote (bolded), therefore is your answer.
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Answer:
13th Amendment (1865)
Abolition of slavery: Slavery is not allowed in any state or territory under the government of the U.S.A.
Explanation: