Which protocol does it include?

EPC is multiaccess by nature. Which protocol does it include?

A.
PDG.GGSN,UNTS, and LTE

B.
WiMAX, Femtocell, MME, and SGW

C.
UMTS, PGW, SGSN, and Femtocell

D.
LTE, WiMAX, UMTS, and CDMA2000

Explanation: