About the statement of IRATHO, which are correct? (Multiple Choice)

About the statement of IRATHO, which are correct? (Multiple Choice)
A . The HUAWEI eNodeB supports differentiating target system (UTRAN system or GERAN system) to set different event A2 parameters, so as to preferentially trigger the coverage-based switching purpose to the UTRAN system or the GERAN system.
B . When the thresholds of the UTRAN and the GERAN are the same, the eNodeB sends down two different system events A2, which correspond to different systems. When the UE reports the event A2 of the corresponding system, the eNodeB sends down the heterogeneous system measurement of the corresponding system.
C . When the threshold offsets of the UTRAN and GERAN systems are the same, the eNodeB sends down a distinct system event A2, which does not distinguish the system. When the UE reports the event A2, the eNodeB simultaneously sends down the UTRAN and GERAN system measurements.
D . When the base station receives the blind A2 event of the different frequency system, if the sub-switch EmCInterFmqBlindHoSwitch in the parameter CeIIHoParaCfg.CellHoAlgoSwitch is turned on, the different system redirection process based on the measurement report is directly executed.

Answer: ABC