If it is a multiple choice question pick B,C, and E. If you can only pick one I guess go with just C. I am answering based off of what I was reading right now. Sorry, if I mess it up for you. Good luck!
Answer:
Explanation:
War can wipe out a generation of men and cause a slight dip in the birth rates. Women end up raising children on their own because their husbands died in the war.
Answer: athletic performance
This is the ONLY topic that is not studied cross-culturally by psychologists. Because the other three topics vary between cultures, they are studied and compared by psychologists. By doing this, psychologists can find the most effective methods by each culture to construct a method to best solve issue within those areas. Hope this helps!
Gadsden purchase? That's all I know about conflict with Mexico and the United States.
There were several reasons why Hitler had German children join Nazi organizations, but perhaps the greatest was that he wanted to engrain them with propaganda from the earliest possible age so it stuck with them.