一个2G-LTE多模UE将在下述条件下发生异系统重选（）
A.S_serving< THRESH_2G_low 且 S_non-serving_LTE > THRESH_LTE_low
B.S_serving< THRESH_2G_low 且 S_non-serving_LTE < THRESH_LTE_low 且 S_non-serving_LTE > S_serving + H_PRIO
C.S_serving> THRESH_2G_low 且 S_non-serving_LTE > THRESH_LTE_low
D.S_serving> THRESH_2G_low 且 S_non-serving_LTE < THRESH_LTE_low 且 S_non-serving_LTE > S_serving + H_PRIO
正确答案是AB