In the Cladogram Shown,the Animals Across the Top Are a Lancelet,lamprey,salmon,lizard,and

In the cladogram shown,the animals across the top are a lancelet,lamprey,salmon,lizard,and rabbit (from left to right) .If the salmon,lizard,and rabbit are an ingroup,which animals would be an outgroup and which characteristics are necessary to be in the ingroup?

A) Lamprey and lancelet;notochord and vertebrae.
B) Lamprey only;vertebrae,hinged jaw,tetrapod,and mammary glands.
C) Lancelet and lamprey;hinged jaw,tetrapod,and mammary glands.
D) Lancelet,lamprey and salmon;hinged jaw,tetrapod,and mammary glands.
E) Lizard and rabbit;tetrapod and mammary glands.