正解:C
Route filtering in OSPF works differently than EIGRP/RIP, etc. The distribute-list and prefix-list in OSPF do not filter LSAs that are sent and received between routers.
ABR can filter LSA type 3. To filter LSA type 3 in OSPF, use the area filter-list command in ABR.
By using inbound filtering into an area, it does not matter from which area the prefix came, everything that goes into area 1 will hit the prefix-list and will be filtered.
Good lab: https://networklessons.com/ospf/ospf-abr-type-3-lsa-filtering-on-cisco-ios