In the Period Between 1933 and 1936, the Nazi Regime

In the period between 1933 and 1936, the Nazi regime implemented laws that defined who was and was not Jewish according to ancestry. Any person with three or four Jewish grandparents was considered a "full-blooded" Jew; those with fewer (but more than zero) were considered "half-breeds" or "mongrels." This approach to dividing and categorizing people relies on the assumption that:

A) phenotype determines race.
B) race is a cultural reality, but not a biological one.
C) Judaism is a religion, not a race.
D) race is a biological reality.