Echidnas, Wombats and Ghost Bats Have Hair and Suckle Their

Echidnas, wombats and ghost bats have hair and suckle their young with milk from mammary glands, and these characteristics distinguish them from other amniotes, including their ancestors, early reptiles. Wombats and ghost bats have separate anal and urogenital openings, and mammary glands with teats. Wombat young are born at an early embryonic stage and complete their development attached to teats inside a protective pouch.
When determining the evolutionary relationship between wombats and ghost bats, the teats and pouches of wombats would both be considered

A) plesiomorphic characters.
B) apomorphic characters.
C) synapomorphic characters.
D) autapomorphic characters.
E) phylogenetic character.