Regarding the RRC establishment success rate, which of the following descriptions is wrong?

Regarding the RRC establishment success rate, which of the following descriptions is wrong?
A . Reflecting the E admission capability of the eNB or the cell
B . Service-independent RRC connection establishment is an important indicator to measure the call completion rate. The service-related RRC connection establishment can be used to investigate the system load situation.
C . RRC connection establishment can be divided into two cases: one is the service-related RRC connection establishment; the other is independent of the service (e.g. emergency call, the inter-system cell reselection, signup, etc.) RRC connection establishment
D . The successful establishment of the RRC connection means that a signaling connection is established with the network.

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Answer: B