Which of the following statements is NOT true?（）

• A、Oliver Cromwell became Lord Protector of the Commonwealth of England in 1653 by the Petition of Right.
• B、Oliver Cromwell crushed without mercy a rebellion in Ireland.
• C、Oliver Cromwell suppressed the Levellers,a group within his own army who advocated total religious and social equality.
• D、Oliver Cromwell replaced the Rump with an assembly largely chosen by himself.