"TDLTE的A5事件的measurementPurpose设置为（）时，则LTE到GSM的切换使用A5
A.A. Mobility-Intra-Freq
B.B. Mobility-Inter-RAT-to-GERAN
C.C. Mobility-Inter-Freq-to-EUTRA
D.D. Mobility-Inter-RAT-to-UTRA"
正确答案是B