How Often Should a Business Continuity Plan Be Updated or Reviewed

Multiple Choice

How often should a Business Continuity Plan be updated or reviewed?

A) Never. Once the BCP is written, it does not need to be reviewed.
B) Only if new information appears that would change the BCP
C) On a regularly scheduled frequency (with more reviews if data warrants it)
D) Since the BCP is never completely finished, it is always being reviewed and updated.