Concept:The Gandhi test is a moral guideline for judging whether an action is good or bad.Explanation:If you are comfortable with other people knowing about what you do, the action is likely good.If you would not want others to know about it, the action is likely bad.Thus, the test uses public knowledge as a measure of moral quality.Answer:Option C: you can tell that what you are doing is good or bad if you want other people to know about it or not.