When Svante Paabo and colleagues sequenced the entire mtDNA genome of Neanderthal, they found low genetic diversity in spite of having samples collected from a wide geographic area. On average, the mtDNA of Neanderthals is 1/3 as diverse as humans. What does this imply?
a. Humans evolved from Neanderthals
b. Neanderthals and humans are distantly related
c. Neanderthals had a small population size
d. Neanderthals have a larger population than modern-day humans