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.
The structure of the government will change over time.

B.
The powers of government should be separated among its branches.

C.
An individual's right to justice is something the government can protect.

D.
It is more important for the government to run efficiently than to protect individual rights.