please help this is very important i will give you brain thing if its correct and no links pwease <3

Choose all that apply.which of the following is characteristic of a rural lifestyle? slow-pacedmany deadlineshigh level of stressclose families

Martha participates in a research study in order to receive extra credit for her psychology class. when she arrives in the research office she is given a can of what looks and tastes like beer, but which actually contains no alcohol. in the adjoining room martha's classmate karen is also participating in the study. karen receives a can of alcoholic beer. if the experiment was designed to test the effects of alcohol on concentration, then who is exposed to the independent variable?

Which of these persons was a co-founder of twitter? eric schmidt jack dorsey tim cook paul alle