25 points to whoever can prove they deserve it mwahahahaha

Which choice best describes how your answer compares to the sample

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:

What effect has mass media had on obesity in the united states a. television commercials and programs have promoted increased acceptance of obesity b. public service announcements have halted the increase in obesity c. educational documentaries have caused obesity in the united states to fall d. advertisments for unhealthy foods have encouraged obesity