The statement that contain a key idea in the Declaration of Independence is that the power of government comes from the people.
The fact that the power of government comes from the people emanates from the Social contract theory which explains that the persons' moral and political obligations are dependent upon a contract or agreement among them to form the society in which they live.
Thomas Hobbes explained the social contract theory as the method of justifying political arrangements by appeal to the agreement that would be made among suitably situated rational, free, and equal persons. Therefore, the Option B is correct.
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