What are the three rules for Shared Members in ASO?

What are the three rules for Shared Members in ASO?

A.
A Multiple Hierarchy Enabled dimension can have shared members.

B.
When a hierarchy is tagged Multiple Hierarchies Enabled, it must be store.

C.
The alternate hierarchy has shared members that refer to non shared members of
previoushierarchies in the outline.

D.
The shared members roll up according to a different hierarchy from the non shared
members to which they refer.

Explanation:
http://www.oracledatabase12g.com/wpcontent/uploads/book/Oracle%20Essbase%20&%20
Oracle%20OLAP.pdfPage 438-439