I feel like social research is important so you can learn more about people and their behaviors
Answer:
Definitely A.
Explanation:
The other things said are mostly not true. its just common sense "A". and D isnt the answer, why the hell would a constitutional document contain words describing how to live your life? they only regulate it.
If you are talking about Nazi German its because Hitler didn't like them and they went to concentration camps (wouldn't mind brainliest)