What Characteristic Distinguished the English Parliament from Other Representative Assemblies

What characteristic distinguished the English Parliament from other representative assemblies?

A) The English Parliament had a clear bicameral legislature with some representation for the commoners.
B) The nobles participated in the legislature rather than simply bringing their cases directly to the king.
C) The English Parliament provided a clear source of authority so that the politics of the royal court never gained significant political weight.
D) The frequency of the English Parliament's meetings established the sense and expectation that its authorization was required for certain types of legislation.