Which One of the Following Statements About the Evolution of Speech

Which one of the following statements about the evolution of speech is false?

A) In humans a single point mutation in the FOXP2 gene impairs speech and grammar.
B) FOXP2 may be involved in songbird singing and mouse vocalization.
C) The protein coded by the FOXP2 gene differs by only two amino acids in humans and chimps.
D) The FOXP2 gene is involved in the control of the neuromuscular pathway leading to complex sound formation.
E) FOXP2 codes for a hormone that directly targets the muscles of the larynx and mouth.