Magna Carta is one of the earliest and most celebrated documents to which United States can trace its democratic heritage. Thus, the answer to the question above is letter A. This served as the foundation for the evolution of parliamentary.
The Twelve Tables was a set of laws inscribed on 12 bronze tablets created in ancient Rome in 451 and 450 BCE.
They were the beginning of a new approach to laws which were now passed by government and written down so that all citizens might be treated equally before them.