Which two voice-gateway, analog-interface statements are true? (Choose two)

Which two voice-gateway, analog-interface statements are true? (Choose two)

A.
A router can use a Foregn Exchange Office (FXO) interface to connect to a PSTN.

B.
A router can use a Foreign Exchange Station (FXS) interface to connect to a PBX.

C.
An analog fax machine can connect to a Foreign Exchange Office (FXO) interface.

D.
An analog telephone can connect to a Foreign Exchange Station (FXS) interface.