Correct answer is c. to make it easier for Nazi's to identify and deport suspected Communists.
Explanation:
Nuremberg Laws were anti Semitic laws, which means that were directly pointed towards Jews. That is why options A, B and D are not correct, as they are parts of this laws and are discussing why Jews shouldn't be allowed to participate in the public life.
B is correct, because Nuremberg Laws were not brought to settle accounts with the Communists.