Which of the following is a true statement about the constitution? a. it distributes power among three branches of government. b. it has a president who heads three branches of government. c. it imparts authority on tax policies to the state governments. d. it gives supreme authority to the separate state governments.

A. It distributes power among three branches of government.

Explanation:

One of the characteristics of the U.S. Constitution is that it is based on the political doctrine of separation of powers, in which the power of the government is distributed among three branches in order to prevent the concentration of power and provide for the principle of checks and balances.  

Article 1 of the U.S. Constitution, establishes the Legislative Branch, consisting of a bicameral Congress whose main job is to make the laws.

Article 2 establishes the Executive Branch, whose power is vested in the President. Its principal job is to enforce the laws enacted by Congress.

And lastly, Article 3 establishes the Judicial Branch that consists of one Supreme Court, whose main duty is to interpret the laws and to determine whether actions from the Executive and the Legislative are unconstitutional or not.