In dual-system hot backup, which of the following statements about HSB backup channels is wrong?

In dual-system hot backup, which of the following statements about HSB backup channels is wrong?
A . The HSB backup channel between the main and standby ACs is recommended to be connected separately to ensure its high reliability
B . The HSB backup combination backup service is independent of each other, and the HSB backup group can work normally without binding.
C . Under VRRP hot standby, the active/standby status of the HSB backup channel follows the changes in the active/standby status of VRRP
D . Under dual-link hot backup, HSB channels have no active/standby status, only data backup channels

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Answer: B