Despite the fact that dinosaurs have always been classified

Despite the fact that dinosaurs have always been classified as members of the reptile family (their very name derives from the greek word 'terrible lizard'), recent evidence indicates that at least some dinosaurs were physiologically more similar to birds than to reptiles.These so called ornithischians possessed the upright posture, specialised food processing definitions and other skeletal features that are normally associated with endohermic creatures.

Which of the following can be reasonably inferred from the above?

a)The biological similarities between dinosaurs and reptiles are merely superficial
b)modern day birds are the direct descendents of dinosaurs
c)No dinosaurs were physiologically more similar to reptiles than to birds
d)Reptiles are not endothermic creatures
e)Only birds are endothermic creatures

Please support your choices with explanations.

Best