An SSA disk that is part of the mirrored volume group needs to be replaced. Which of the following procedures should be performed before the disk is physically able to be replaced?（）

• A、reducevg, rmdev, syncvg 
• B、rmlvcopy, exportvg, rmdev 
• C、rmlvcopy, reducevg, rmdev 
• D、No action is required since SSA is a Hot Swap device and is mirrored