What effect does the economy have on society

In which natural environment has urbanization most frequently occurred

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?

Economic growth in the united states does not affect the economies of other countries. select the best answer from the choices provided t f