How can migration affect the density of an area​

American sign language is a. not a distinct language by definition b. processed primarily by the left hemisphere, similar to other languages c. processed more or less equally by both the left and right hemispheres d. processed primarily by the right hemisphere because it is based on spatial characteristics

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:

How would you summarize john hay's first request in the first open door note?