Which of the following statements are TRUE of VPN-1/FireWall-1 groups? (Choose two)

A.
Groups can be nested in groups.

B.
The contents of one group can be imported into another group.

C.
Services and network objects can be placed in the same group.

D.
User groups can be nested, but network-object groups cannot.

E.
Users and services can be placed in the same group.