Which command would successfully extend a Data Mover root file system?

A.
as root issue
/nas/sbin/rootnas_fs -xtend root_fs_2 size=2G pool=clar_r5_performance

B.
as nasadmin issue
nas_fs -xtend root_fs_2 size=2G pool=clar_r5_performance

C.
as root issue
/nas/sbin/rootnas_fs -xtend root_fs_2 size=2K pool=clar_r5_performance

D.
as nasadmin issue
nas_fs -xtend root_fs_2 size=2G pool=clar_r5_performance