A) States the conditions of an agreement.
A charter is a formal written document, usually by the authorities of society, that states the conditions of an agreement as well as the rights, aims, principles of people in society, and the conditions in which it is organized.
One example of a charter is the English Bill of Rights (1689), which was an Act of the Parliament of England that established certain rights to the people, the parliament and the monarch, aiming to limit the government's power and bring more justice to civilians.