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