Which option is true regarding the synchronization rule?

Which option is true regarding the synchronization rule?

A.
Do not use or internally advertise a route until the route is learned from a source other
than BGP.

B.
Do not use or advertise a route until the route is learned from a BGP peer.

C.
Do not use or advertise routes marked PARTIAL.

D.
Wait until a CONFIRM message is received before using routes from BGP neighbors.