The Phylogeny Below Shows Relationships Between Birds and Four Different

Multiple Choice

The phylogeny below shows relationships between birds and four different dinosaur genera. Based on the logic of phylogenetic systematics, which of the following statement(s) is/are accurate?

A) Dinosaurs and birds form a monophyletic group.
B) In order for dinosaurs to be a valid taxon, birds must also be called dinosaurs.
C) Dinosaurs are a paraphyletic group.
D) all of the above
E) none of the above