The BACKUP_TAPE_IO_SLAVES parameter is set to FALSE for the database instance. Which statement is true while performing a tape backup in an RMAN session?（）

• A、The tape I/O performed is asynchronous
• B、The tape buffer is allocated from the System Global Area (SGA)
• C、The tape buffer is allocated from the Program Global Area (PGA)
• D、Oracle I/O uses an interrupt mechanism to determine when each I/O completes