We the people of the united states, in order to form a more perfect union, establish justice, insure domestic tranquility, provide for the common defence, promote the general welfare, and secure the blessings of liberty to ourselves and our posterity, do ordain and establish this constitution for the united states of america.1

which idea is expressed in this excerpt from the constitution?

a. states are as responsible for the defense of the nation as the military is.
b. the constitution is a guiding document that will improve the country.
c. it is important to amend the constitution to keep it relevant.
d. average citizens cannot be trusted with political power.

The correct answer is B. The Preamble of the Constitution express that the Constitution itself is a guiding document that will improve the country.

Explanation:

The Preamble to the United States Constitution is a brief introductory statement of fundamental declarative and introductory principles of the Constitution. It establishes general terms and objectives that the courts use as a faithful reference to the intentions of the Founding Fathers on the meaning of the Constitution and what they expected it should achieve.

The phrase "WE, THE PEOPLE" is of singular importance because it stipulates that the power and authority of the federal government of the United States of America does not come from the various states or the people of the various states, but from an entity that is identified as the People of the United States of America, with the Constitution serving as a compact or contract between the People of the United States of America, the various states, and the new entity: the federal government of the United States of America.

social contract theory, nearly as old as philosophy itself, is the view that persons' moral and/or political obligations are dependent upon a contract or agreement among them to form the society in which they live