Select one correct answer about Nikoli Vavilov and his study on origins of agriculture.
O He was an American genetic scientist who studies animal domestication.
O He mapped geographical centers of ancient civilizations.
O His claims that the geographical origins of a certain crop can be traced by checking its genetic diversity.
O Her realized that the high diversity of species does not necessary prove its geographical origin.
O His study on domestication is based on ancient DNA data from archaeological remains.