Which research project studuesd more than 500 children adn their parents in the 1920?

The Berkeley Longitudinal Studies was the research project studied more than 500 children and their parents in the 1920.

Explanation:

Understanding the Berkeley Longitudinal Studies

In 1920s ,a research on more than 500 children alongside their parents was conducted, under the heading of the Berkeley Longitudinal Studies, to investigate the different aspects of human personality. They came to know about some of the stable characters of the human personality which were; orientation towards of humans self confidence, intellectualism, and the readiness towards accepting new ideas and experiences.

world war i had a devastating effect on german-americans and their cultural heritage. up until that point   german-americans, as a group, had been spared much of the discrimination, abuse, rejection, collective mistrust experienced by so many different racial and ethnic groups in the history of the united states. indeed, over the years, they had been viewed as a well integrated and esteemed part of american society. all of this change with the outbreak of war.  

sumerians were polytheistic, meaning they believed in many different gods. so, the best answer is c.