Question ID:PT7 S1 Q5 Passage:Many environmentalists have urged environmental awareness on consumers, saying that if we accept moral responsibility for our effects on the environment, then products that directly or indirectly harm the environment ought to be avoided. Unfortunately it is usually impossible for consumers to assess the environmental impact of a product, and thus impossible for them to consciously restrict their purchases to environmentally benign products. Because of this impossibility there can be no moral duty to choose products in the way these environmentalists urge, since ______. Stem:Which one of the following principles provides the most appropriate completion for the argument? Correct Answer Choice:BChoice A:a moral duty to perform an action is never based solely on the effects the action will have on other people Choice B:a person cannot possibly have a moral duty to do what he or she is unable to do Choice C:moral considerations should not be the sole determinants of what products are made available to consumers Choice D:the morally right action is always the one whose effects produce the least total harm Choice E:where a moral duty exists, it supersedes any legal duty and any other kind of duty