Which protocol does it include?

EPC is multi access by nature. Which protocol does it include?

A.
WiMAX, Femtocell, MME, and SGW

B.
LTE, WiMAX, UMTS, and CDMA2000

C.
PDG, GGSN, UMTS, and LTE

D.
UMTS, PGW, SGSN, and Femtocell