All of the Following Statements Are Evidence That Evolution of the FOXP2

All of the following statements are evidence that evolution of the FOXP2 gene may have contributed to the evolution of language in humans EXCEPT:

A) Humans with mutations in FOXP2 have problems with speech and language.
B) Differences in the FOXP2 gene between humans and chimps are mostly due to synonymous mutations, whereas differences between mice and chimps are mostly due to nonsynonymous mutations.
C) Studies of Neanderthal DNA have shown that Neanderthals possessed the modern human version of FOXP2.
D) FOXP2 encodes an evolutionarily conserved transcription factor that plays an important role in development, including brain development.