Ihave 3 questions i'm stuck on, if someone could i'd appreciate it!

21. explain the significance of the supreme court's ruling in the case engel v. vitale

22. select one of the six organizing principles of the constitution and apply it to the bill of roghts. how is that principle supported or limited in the bill of rights?

23. what is the difference between the due process protections in the fifth amendment and the fourteenth amendment, and why is that difference significant?

What conflict ended the false doctrine of "states rights"

Which country had the most spiritual influence on classical china? a) india b) japan c) korea d) mongolia

The authors of the paper "fudging the numbers: distributing chocolate influences student evaluations of an undergraduate course"† carried out a study to see if events unrelated to an undergraduate course could affect student evaluations. students enrolled in statistics courses taught by the same instructor participated in the study. all students attended the same lectures and one of six discussion sections that met once a week. at the end of the course, the researchers chose three of the discussion sections to be the "chocolate group." students in these three sections were offered chocolate prior to having them fill out course evaluations. students in the other three sections were not offered chocolate. the researchers concluded that "overall, students offered chocolate gave more positive evaluations than students not offered chocolate." indicate whether the study is an observational study or an experiment. give a brief explanation for your choice.