Whitch effect do you think first followed the causes?

What percentage of roads in germany have no speed limit?

Which of these best describes why georgia was important to united states during world war i? a)georgia made money by selling cotton and wood to europe.b)more soldiers came from georgia than from any other state.c)many white planters volunteered to serve in the war effort.d)the state had many federal installations and training camps

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?