Remember a transitional form should be difficult to easily classify as either "A" or "B" because it has a mix of features from both groups, and/or because it has features that are intermediate in form between those typical of either group (both things are true of Archaeopteryx). You've illustrated the thoroughly intermediate character of Archaeopteryx beautifully because -- to the extent you are held responsible for your references -- you yourself can't decide whether it's a bird or a dinosaur!