Which two actions are true about using standard and parent tabs?

Which two actions are true about using standard and parent tabs?

A.
To use parent tabs, you must use a page template that supports them.

B.
You cannot apply authorization at standard tab level.

C.
You can resequence the display order of standard tabs.

D.
When you create or edit a standard tab, for the Tab Label attribute, you cannot use
substitution values.