A Cisco voice gateway is connected to the PSTN via an analog line. How can the gateway be configured to support caller ID?

A.
using MGCP and an FXO port to the PSTN

B.
using H.323 and an FXO port to the PSTN

C.
using MGCP and an FXS port to the PSTN

D.
using H.323 and an FXS port to the PSTN