A system administrator is preparing to run a preservation install and would like to use and hdisk that was no longer needed in datavg. Which of the following processes should be used to make it available for configuration?（）

• A、chdeb -1 hdiskxxx -a pv=clear; chdev -1 hdiskxx -a pv=yes
• B、exportvg datavg; importvg -y rootvg hdiskxx
• C、rmdev -1 hdiskxxx; mkdev -1 hdiskxxx -a pv=avail
• D、reducevg datavg hdiskxxx; extendvg rootvg hdiskxxx