Which statement is correct about the OSPF link-state database?

Which statement is correct about the OSPF link-state database?
A . Each router within the same area must maintain a unique copy of the link-state database.
B . Each router within the same area must maintain an identical copy of the link-state database.
C . Each router within the OSPF domain must maintain a unique copy of the link-state database.
D . Each router within the OSPF domain must maintain an identical copy of the link-state database.

Answer: B