对E-RAB Drop Rate的统计那个计算方式是正确的?
A、Number of normally released E-RAB / Number of successfully nestablished E-RAB x 100%
B、Number of abnormally setup E-RAB / Number of successfully nestablished E-RAB x 100%
C、Number of abnormally released E-RAB / Number of successfully nestablished E-RAB x 100%
D、以上都不对