Which three attributes of the LOG_ARCHIVE_DEST_n initialization parameter control the data availability mode of a Data Guard standby database？ （）

A、SYNC or ASYNC to identify the network transmission mode. 

B、LGWR or ARCH to identify the primary database process responsible for sending redo information to the standby. 

C、AFFIRM or NOAFFIRM to control whether log archiving disk write operations are to be performed synchronously or asynchronously. 

D、PROTECTED or UNPROTECTED to control the degree of divergence and data loss at the standby database.