How can deflation affect rock size? A.) Sand rubs against other rocks through the process of deflation.
B.) Deflation is a type of wind erosion.
C.) Smaller sediments break apart only large rocks through deflation.
D.) Deflation can cause rocks to lose air.

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: