Read the following quotation from the Constitution. "We the People of the United States, in Order to form a more perfect Union, establish Justice, insure domestic Tranquility. . . .do ordain and establish this Constitution for the United States of America." Which of the following describes the purpose of the paragraph?

Dr. robbins wants to know if there are different opinions regarding the value of public school education between native americans who have at least one relative who attended indian boarding school and native americans who have no family experience with indian boarding school. dr. robbins contacts 35 native american participants in each group. he wants each group to include younger as well as older adults, and a mix of male and female participants. he asks each person to complete a survey about their attitudes toward public education. the design of this study is: