The correct answer is D.
Since the Nazi party arrived to power in Germany, they started to enact discriminative legislation against Jews: first of all, Jews were forced to carry an identification that consisted on wearing a yellow star. Afterwards, they were restricted from certain jobs (public offices) and banned in schools and colleges.
Later on they would be expelled from their houses and business and forced to move and live all together in separate areas in the cities, called ghettos. The last step took place during the war, and it is the Holocaust, which consisted on the deportation and massive extermination of millions of Jews in death camps.