Describe the geographic range of H. neanderthalensis and which populations of H. sapiens interbred with them.
a. H. neanderthalensis had a broad geographic range covering Eurasia, while H. sapiens populations from Africa interbred with them.
b. H. neanderthalensis was limited to Africa, and interbreeding occurred with H. sapiens from Eurasia.
c. Both H. neanderthalensis and H. sapiens were confined to Africa, with minimal interbreeding.
d. H. neanderthalensis and H. sapiens had separate geographic ranges with no interbreeding.