Pax-6 is a gene that is involved in eye formation in many invertebrates,such as Drosophila.Pax-6 is found as well in vertebrates.A Pax-6 gene from a mouse can be expressed in a fly and the protein (PAX-6)leads to a compound fly eye.This information suggests which of the following?

A)Pax-6 genes are identical in nucleotide sequence.
B)PAX-6 proteins have identical amino acid sequences.
C)Pax-6 is highly conserved and shows shared evolutionary ancestry.
D)PAX-6 proteins are different for formation of different kinds of eyes.
E)PAX-6 from a mouse can function in a fly, but a fly's Pax-6 gene cannot function in a mouse.