A、None. The database will switch over to the stand-by archive-log destination directory. 
B、A warning message will be written to the alert log of the database, but no adverse impacts to the database will be experienced. 
C、The database will shut down, and will not restart until you correct the out-of-space situation. 
D、The database will continue to try to write to the archive-log destination directory for one hour. After one hour, the database will shut down normally. 
E、Once Oracle has cycled through all online redo logs, it will stop processing any DML or DDL until the out-of-space condition is corrected.