If Genetic and Morphological Evidence of Archaic-Modern Interbreeding Had Never

If genetic and morphological evidence of archaic-modern interbreeding had never been discovered,which model explaining modern Homo sapiens origins would be most likely,and why?

A) The Out-of-Africa model would be most likely because of continuity between modern human fossils and early African fossils,and low genetic diversity in Africa.
B) The Out-of-Africa model would be most likely because of continuity between modern human fossils and early African fossils,and high genetic diversity in Africa.
C) The Multiregional Continuity model would be most likely because modern Asians share traits with Asian Homo erectus,and modern Europeans share traits with Neanderthals.
D) The Multiregional Continuity model would be most likely because human genetic diversity is similar in Africa,Europe,and Asia,suggesting stable populations for long periods of time in each region.