B. She’d
Explanation: She’d is short for she would and we are talking and the future so that is why she would or She’d would be the best choice.
Life, liberty and pursuit of happiness
The correct answer is A: the consent of the people.
Jefferson makes it very clear that the source of a government's authority is the consent of the people. He uses the phrase "consent of the governed," which means the people (since they are the ones who are governed).
He does not believe a government's authority comes from tradition, the military, or a leader.