Which mechanism does OSPFv3 use when the router LSA is too big to be sent out?

Which mechanism does OSPFv3 use when the router LSA is too big to be sent out?

A.
It relies on IPv6 to do the fragmenting.

B.
It splits the LS Update packet into smaller packets.

C.
It splits the LSA into smaller router LSA packets.

D.
It produces an error.