LTE系统内的切换失败，意味着________. | Handover to E-UTRA failure means _________.
A.T304超时 | T304 EXPIRY
B.T310超时 | T310 EXPIRY
C.UE应重设MAC | UE SHALL RESET MAC.
D.UE应重设PHY | UE SHALL RESET PHY.
正确答案是AC