Which three are true about the use of the VALID_FOR clause of the LOG_ARCHIVE_DEST_N

parameter, in determining whether archive logs should be written to a particular destination by a database in a Data Guard environment? (Choose three.)

A. whether the database at the destination is reached by using a far sync instance

B. whether the database at the destination is a primary or a standby

C. whether online redo logs are to be archived at a specific destination

D. whether standby redo logs are to be archived at a specific destination

E. whether the database at the source is a primary or a standby