Question 23 1 pts What is the purpose of the North Atlantic Treaty Organization? (1 point) O To saleguard the freedom of its members through political and military means O To deal with the rules of trade between nations at a global or near-global level O To serve in the cause of peace by living and working in developing countries O To provide free, quality education for all children worldwide​

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?