In SCSI disks used in high end PCs, the controller maintains a list of bad blocks on the disk. The disk is initialized during low-level formatting which sets aside spare sectors not visible to the operating system. The scheme used is known as _______ or ________

• A. sector sparing & forwarding
• B. forwarding & sector utilization
• C. backwarding & forwarding
• D. sector utilization & backwarding