Which rules apply to physical user schema names? (Select two.)

A.
The fourth character must be a letter.

B.
The subvolume name always starts with ZSD.

C.
The subvolume name length must be between 4 and 8.

D.
Vowels and the digit zero are not allowed in user-defined names.

E.
The subvolume name is always system-generated; the user can not define it.