Every morning at the bus stop, carlos encounters an old woman begging for change. she is clearly hungry and alone. because carlos feels very bad for this woman and can "feel her pain," he makes a point of giving her some change each morning that he sees her. which theoretical approach best explains carlos's behavior? social-exchange theory kin selection the empathy-altruism hypothesis the norm of reciprocity

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: