what must be done to allow to allow Staff members to call Executives and still prevent Lobby phones from calling Executives?

You would like to restrict your lobby phone so that it can only call 911 and staff members. Based on the exhibit, what must be done to allow to allow Staff members to call Executives and still prevent Lobby phones from calling Executives? (Choose two)

A.
Add member Manager to COR list Staff.

B.
Add member Manager to COR list Lobby.

C.
Add COR outgoing Executive to ephone-dn 12.

D.
Add COR incoming Manager to ephone-dn 13