The correct answer is, the important changes in law that the Magna Carta produced were:
1.- It established for the first time the principle that every citizen was subjected to the law, the King included.
2.- It gave the people the right to justice and fair trial.
3.- It states that no taxes will be demanded without the general approval of the Realm.
The Magna Carta was created by King John of England in 1215. It was one of the most important documents in history for its influence in the creation of other body of laws that latter were part of Constitutions in other nations. The original Carta Magna (The Great Charter), had 63 clauses and it is considered the base of modern democracy in Great Britain.