The requirements and functional specifications have been completed and the acceptance test strategy is now in development．At what point in the project should the project manager plan for events not happening in accordance with the project plan? （　）
A．When the unanticipated events occur, because this approach saves you valuable time
B．Contingency planning should occur throughout the project life cycle
C．Only during the development of the risk management plan
D．Contingency planning occurs mainly in the Design Phase