What happens in relation to the CRL cache after a cpstop and cpstart have been initiated?

What happens in relation to the CRL cache after a cpstop and cpstart have been initiated?

A.
The Gateway retrieves a new CRL on startup, and discards the old CRL as invalid.

B.
The Gateway continues to use the old CRL, as long as it is valid.

C.
The Gateway continuous to use the old CRL even if it is not valid, until a new CRL is cashed.

D.
The Gateway issues a crl_zap on startup, which empties the cache and forces certificate retrieval.