The Molecular Genealogy Research Group is building a database for the purpose of ______ .A

The Molecular Genealogy Research Group is building a database for the purpose of ______ .

A．offering assistance in working out genealogy-related problems

B．solving many issues without relying on traditional written records

C．providing a pedigree chart of at least four generations in the world

D．confirming the assumption that all individuals are of the same origin