Which event has occurred in argentina, brazil, chile, uruguay, and nigeria? a. military governments have replaced civilian governments b. authoritarian party systems have replaced competitive party systems c. competitive party systems have replaced military governments d. military governments have replaced competitive party systems e. military governments have replaced authoritarian party systems

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?