The correct answer to this open question is the following.
Although there are no options attached we can say the following.
The Framers included the Preamble as the introduction to the US Constitution to establish the goals and purposes of government.
With the Preamble at the beginning of the Constitution, the framers and American founder fathers wanted to clearly state the goals of the federal government, no matter who the President would be.
The Preamble can be used to evaluate how the federal government is doing its job in that the Preamble of the United States Constitution clearly and succinctly states the standard that the federal government needs to show and perform to govern the country. The Preamble clearly states that the government must maintain the union, establish justice, promote peace and welfare, and promote the liberties of the citizens. So that is the reference and the standard the US officials must follow to perform their jobs.