Birds and Insects Both Have Wings,but We Do Not Consider

Birds and insects both have wings,but we do not consider this similarity as evidence of relatedness because

A) bird and insect wings function on different physics principles of lift.
B) insect wings are vestigial.
C) the wings are not homologous structures with a common ancestral origin.
D) these animals did not evolve in the same region or live at the same time perioD.
E) the wings are different in sizE.