The Signing of the Magna Carta by England's John the First

The signing of the Magna Carta by England's John the First in the 13?? century had led to

A) English monarchs' acceptance that their powers were limited and they too were bound to the laws.
B) helped establish a more centralized monarchy.
C) led directly to the War of the Roses.
D) contributed to the country's losses in the Hundred Years' War.
E) finally placed some minimal restraints on the unruly nobles.