Which port type must be connected to the fax device for the Cisco Unified CallManager Express to support fax pass-through, T.38 and Cisco fax reply?

Which port type must be connected to the fax device for the Cisco Unified CallManager Express to support fax pass-through, T.38 and Cisco fax reply?

A.
FXS

B.
FXO

C.
ATA

D.
FAX