What is the IFC responsibility for Unaccompanied Minors (UMNR) prior to departure?

A) Ensuring the UMNR is properly checked-in and has all necessary travel documents.
B) Assisting the UMNR with any special needs or requests.
C) Informing the UMNR about the airline's policies and procedures for UMNRs.
D) Ensuring the UMNR is safely handed over to the designated guardian or airline staff.
E) All of the above.