In the diagram, R3 receives an LSA with the sequence number 111 from R7 and then
receives another copy of the LSA with a sequence number 112 from R1 What does R3 do
with the LSA from R1?

A.
R3 installs the LSA received from R1 in its link state database and floods a copy to its
neighbors.

B.
R3 discards the LSA received from R1 and sends an ACK to R1

C.
R3 discards the LSA received from R1 and sends a copy of the LSA from its link state
base to R1

D.
R3 installs the LSA received from R1 in its link state database, sends an ACK to R1 and
floods a copy to its neighbors.