Which of the Following Statements Best Describes the Current Scientific

Which of the following statements best describes the current scientific view of birds?

A) a group of feathered, endothermic dinosaurs
B) a group of feathered, ectothermic lizards that lack teeth
C) a group of flying, endothermic reptiles that have lost teeth, the amniotic egg, and other heavy body features as an adaptation for flight
D) a group of flying mammals that are derived from monotremes, which also lay amniotic eggs