Which Listed Procedure Should Be Followed to Accomplish a Change

Which listed procedure should be followed to accomplish a change in work that must be executed immediately?

A) The designer should immediately provide supplemental instructions to the contractor.
B) The owner should immediately request a proposal, then promptly negotiate the necessary change.
C) A change directive should be provided to the contractor by the construction manager or owner.
D) The contractor should anticipate the need for the change, do the work, then request appropriate payment.
E) None of the above