单项选择题
Given the two AS path regular expressions： "65000+ （65001|65002）" "65000+ （65001|65002）{0，}" Which AS path matches both expressions？（）
A.65000 65001 65002 B.65000 65002 C.65001 65000 D.65001 65002
A.Routers maintain a single link-state database per area. B.Routers maintain a separate Level 1 link-state database. C.Routers maintain a separate Level 2 link-state database. D.Routers maintain a single Level 1 link-state database per area.
A.By specifying the area-range statement. B.By creating aggregate routes and applying policies. C.By specifying the route-summarization statement. D.By specifying the area-range restrict statement.