Regarding the file system quota feature of Huawei OceanStor hybrid flash storage, which statement about Quota Tree is correct? (Multiple choice)

Regarding the file system quota feature of Huawei OceanStor hybrid flash storage, which statement about Quota Tree is correct? (Multiple choice)
A . Quota Tree can be shared through an agreement, and while it is being shared, renaming and deletion are not allowed.
B . You can move files (NFS protocol) or cut files (CIFS protocol) across quota trees.
C . Hard link operations between two different quota trees are not allowed.
D . Administrators can delete non-empty Quota Trees through the command line or GUI management interface.

Answer: AC