Answer:
B. Barons
Step-by-step explanation:
Before the King of England granted the Magna Carta, the "barons" were levied heavily. The tax taken from them was meant to support feudal happenings like money lost due to battles. He was very dominant and controlling over the barons that they became so unhappy about it. This led to the rebellions of the barons because they didn't want the King oppressing their rights.
Under King Henry III (King John's son), the Magna Carta (The Great Charter) was then reissued. This ended the long-time conflict between the King and the barons.