I want to know the answer to the following question:
What supports a scenario of dual origin for Paleo-Indians?
All the background I'm provided with is that "Taking into account that C4c is deeply rooted in the Asian portion of the mtDNA phylogeny and is indubitably of Asian origin, the finding that C4c and X2a are characterized by parallel genetic histories definitively dismisses the controversial hypothesis of an Atlantic glacial entry route into North America."". Is that enough to answer the question?
Answer: no