Which of the following statements is NOT true?（）

• A、In the 13th century a Black Rod went between the two Houses of Parliament for liaison and to discipline the members.
• B、In the 13th century Parliament only met by royal invitation.
• C、In the 13th century Parliament's role was to offer advice,not to make decisions.
• D、In the 13th century the most important part of Parliament was the House of Lords.