Regarding PS switching and PS redirection, which of the following descriptions is wrong?
A . Both ways can support CSFB
B . The UE caller first sends an Extended Service Request to the M
D . According to the UE capability, configuration parameters and algorithm strategy, whether to initiate blind handover can be determined by the two ways.
E . PS switching does not need to read the system message of the 23G network, only the redirection needs
Answer: D