At One Time, Birds Held the Same Taxonomic Rank as Reptilia

Multiple Choice

At one time, birds held the same taxonomic rank as Reptilia and Mammalia. Now, however, they are considered as part of the reptile clade. Without this change, ________.

A) birds would be considered Mammalia because both groups are endothermic
B) birds would be classified according to traits that were convergently evolved
C) Reptilia would be paraphyletic
D) Reptilia would be monophyletic