Why Does a Functioning KMS Have a Cyclical Life Cycle

Why does a functioning KMS have a cyclical life cycle?

A) Knowledge is continually being created and that new knowledge must be placed in context and stored so that it is actionable.
B) Knowledge has a short useful life span and needs to be replaced.
C) As knowledge bases increase in size,they become less useful because the knowledge cannot be disseminated effectively.
D) Knowledge tends to be categorized incorrectly initially,and needs to be refined to become useful.