What Evidence Suggests That Neanderthals May Have Had Red Hair

What evidence suggests that Neanderthals may have had red hair?

A) Neanderthals had a FOXP2 gene that appears to be more actively expressed in cell culture than the human variant.
B) Neanderthals had a FOXP2 gene that appears to be less actively expressed in cell culture than the human variant.
C) Neanderthals had an MC1R gene that appears to be more actively expressed in cell culture than the human variant.
D) Neanderthals had an MC1R gene that appears to be less actively expressed in cell culture than the human variant.
E) Neanderthals lacked the MC1R gene.