Archaeopteryx possesses following reptilian and avian features are:
1) Feathers and wings like birds
2) Beaks like birds
3) Bones of limbs and girdles are bird like
4) Jaws are provided with teeth like reptiles
5) Long, lizard-like tail
6) Poison glands like reptiles
Archaeopteryx is, therefore, considered as a connecting link between reptiles and birds, thereby suggesting that birds have evolved from reptiles.
So, the answer is C.