Which of the Following Is the Strongest Evidence That Suggests

Which of the following is the strongest evidence that suggests Homo sapiens may have intermingled with other species such as H.heidelbergensis and H.neanderthalensis?

A) Evidence of DNA shared between the species would suggest that they may have intermingled with each other.
B) Fossils from all or some of these Homo species dating to the same time period and found in overlapping geographic areas would suggest that they may have intermingled with each other.
C) Fossils from all or some of these Homo species found in overlapping geographic areas as well as evidence of DNA shared between the species would suggest that they may have intermingled with each other.
D) Fossils from all or some of these Homo species dating to the same time period and found in overlapping geographic areas, showing phenotypes intermediate to at least two of the other species as well as evidence of DNA shared between the species, would suggest that they may have intermingled with each other.