Tina is placed on probation for her illegal drug use. which of the following could be a part of her probation? (i) drug testing every week (ii) community service at a homeless shelter (iii) serve time in jail as a punishment a. i and ii only b. i and iii only c. ii and iii only d. i, ii, and iii

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?