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
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