Question ID:PT59 S2 Q22 Passage:A recent study confirms that nutritious breakfasts make workers more productive. For one month, workers at Plant A received free nutritious breakfasts every day before work, while workers in Plant B did not. The productivity of Plant A's workers increased, while that of Plant B's workers did not. Stem:Which one of the following, if true, most strengthens the argument? Correct Answer Choice:AChoice A:Few workers in Plant B consumed nutritious breakfasts during the month of the study. Choice B:Workers in the study from Plant A and Plant B started work at the same time of day. Choice C:During the month before the study, workers at Plant A and Plant B were equally productive. Choice D:Workers from Plant A took fewer vacation days per capita during the month than did workers from Plant B. Choice E:Workers in Plant B were more productive during the month of the study than were workers from Plant A.