Which ephone-dn type does the exhibit represent?

Which ephone-dn type does the exhibit represent?

A.
Sharedephone-dn

B.
Overlaidephone-dn

C.
Dual-lineephone-dn

D.
Single-lineephone-dn

E.
Dual-numberephone-dn

F.
Twoephone-dns with one number