In which of the following configurations should a SAS hard drive jumper be placed for single drive operation？（）

• A、 The jumpers should be placed in the single/master position.
• B、 There are no configuration jumpers needed on a SAS hard drive.
• C、 The jumpers should be placed to give the drive a SCSI ID of 1.
• D、 The jumpers should be placed in the slave position.