Answer:
C. Consent of the citizens .
Step-by-step explanation:
The preamble of the United States of America starts with the words "We the People of the United States" and then proceeds to carry on with the introductory statement for the constitution. It also brings forth the guiding principles by which the nation is to be run or governed.
As can be seen from the phrase itself, we can say that the power of the government is derived from the consent of the citizens. This is because, the statement clearly and explicitly reveals "We the People of the United States", with the emphasis on "We, the people".
Thus, the correct answer is option C.