The filter-policy 2000 export is configured in the IS-IS process, which statement about the function of this command is wrong?

The filter-policy 2000 export is configured in the IS-IS process, which statement about the function of this command is wrong?
A .  It needs to be used in combination with route import, so that only part of the imported external routes can be advertised to neighbors
B .  This command will filter the link state information published externally
C . If this command is not configured, the device will advertise all the routes imported to S-IS by the external routing protocol by default.
D .  It will restrict the publishing of routing entries generated by the device itself

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Answer: D