The correct answer is A. People have the right to define their rights.
In paragraph 2 of the Declaration of Independence, Thomas Jefferson emphasizes that all people are endowed with certain unalienable rights, which include Life, Liberty, and the pursuit of Happiness. He also states the right of the people to alter or abolish a destructive government. However, he does not specifically state that people have the right to define their rights; rather, he asserts that these rights are inherent and given by their Creator.