Depending on the complexity of an organization's business continuity plan (BCP), the plan may be developed as a set of more than one plan to address various aspects of business continuity and disaster recovery. In such an environment, it is essential that: 
A、each plan is consistent with one another. 
B、all plans are integrated into a single plan. 
C、each plan is dependent on one another. 
D、the sequence for implementation of all plans is defined.