The correct answer to this open question is the following.
It seems that you forgot to include the option for this question. This is just a statement from Carta Magna.
Doing some research we find that a probable question would be "what is the historical context of this text?
If that is the case, then the historical context would be the following.
This was a time in medieval England in which the British barons were about to rebel against the King because of his absolutist's power over the reign. So the barons drafted Carta Magna in 1215 and made King John signed it. So the King of England signed Carta Magna to avoid a rebellion from the barons. Carta Magna made the king accountable under the law and included some rights that never existed before.