Which type of fax/modem should you install to insure Linuxcompatibility?

You need to install a fax server. Which type of fax/modem should you install to insure Linux
compatibility?

A.
External Serial Fax/modem

B.
External USB Fax/modem

C.
Internal ISA Fax/modem

D.
Internal PCI Fax/modem