Compared with Type C dual-homing protection, which of the following description of Type C single-homing protection is wrong?

Compared with Type C dual-homing protection, which of the following description of Type C single-homing protection is wrong?
A . Simple networking and easy OLT/ONU management.
B. When the OLT or the OLT uplink fails, it can be switched to another OLT.
C. OLT failure will cause service interruption.
D. To protect the important business of users, which is used for the protection of enterprise private line access business and base station private line access business.

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Answer: B