Which WAN Access methods support the Synchronous Data Link Control (SDLC) protocol?

A.
ENVOYACP/XF, generalized full duplex, 6100 ADCCP and SNAX/XF

B.
ENVOYACP/XF, SNAX/APN, SNAX/XF, and 6100 ADCCP

C.
ENVOY, generalized full duplex, 6100 ADCCP and SNAX/XF

D.
ENVOY, SNAX/APN, SNAX/XF and 6100 ADCCP