Question

The american breeders association and the eugenics research association broke caucasians into how many different "races."

Answer 1

According to the association, they separate caucasians into Nordic, Germanic and Anglo-Saxon
Nordic Caucasians resided in the Scandanavian region (such as Denmark, sweden, and Norway), Germanic Caucasian most commonly found in middle to eastern Europe, and Anglo-Saxon most commonly resied in western and southern europe

Answer 2

The Caucasian race was divided into three separate races. They consist of the Nordic from the Scandinavian region, the Germanic from Eastern Europe and the Anglo-Saxon races from Western Europe.