Which statement best describes what happens when an OSPF receives an LSA with a higher sequence number than the LSA in its database?A$.$ The router acknowledges the LSA but does not add it to its LSDB and does not flood it to its neighbors. B$.$ The router does not acknowledge the LSA but sends a copy of the LSA from its database to the neighbor from which it received the LSA. C$.$ The router acknowledges the LSA and floods it to its neighbors but does not add it to its LSDB$.$D$.$ The router acknowledges the LSA, adds it to its own database, and floods it to its neighbors