There should be no doubt about a and C.

This manifesto did not practice the political ideas of the enlightenment thinkers, mainly because the French system of * * * realized their political ideas, and the political system of option C and separation of powers was first practiced in the United States, not France.

Option B is correct, because France used to be a country with absolute monarchy, and the Universal Declaration of Human Rights fundamentally denied absolute monarchy, which should be covered in junior high school textbooks here. This is also one of its meanings. Although the D option is correct, it doesn't meet the meaning of the question. Its content to the people is mainly that private property is sacred and inviolable. Moreover, the Declaration of Human Rights is a programmatic document, not a law, and even if it is involved, it does not conform to the meaning of the problem.