Given the two AS path regular expressions：
 "65000+ （65001|65002）"
 "65000+ （65001|65002）{0，}" 
Which AS path matches both expressions？（）

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.

A.IS type
B.attached
C.overload
D.area addresses