Which command upgrades the datadg disk group from version 50 to the current disk group version?

Which command upgrades the datadg disk group from version 50 to the current disk group
version?

A.
vxdg -T 50 upgrade datadg

B.
vxdg upgrade datadg

C.
vxdg currvers datadg

D.
vxdg 50 currvers datadg