"DNA fingerprinting" is a recently introduced biochemical procedure that uses a pattern derived from a person's genet...

the answer mentions that "In the whole population there are various different subgroups, within each of which certain sets of genetic characteristics are shared". But how do we know that these genetic characteristics that are shared are part of the one's considered in the DNA fingerprinting? The option never mentions that, which is why I thought we could not determine if this strengthens or weakens the argument