Which Statement Best Reflects the Relationship Between a Disturbance and an Alternative

Which statement best reflects the relationship between a disturbance and an alternative stable state?

A) Many communities alter between stable states on a seasonal basis, which is not a true disturbance.
B) A community will achieve an alternative stable state only after a major disturbance.
C) An alternative stable state will not happen in aquatic communities, where there is no fire and water is not limiting.
D) Communities can alternate among stable states in the absence of disturbance.