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 complete