(B) Under PRP contracts costs [other than labor costs, such as plant, machinery, and energy], make up an increased proportion of the total cost of each unit of output. 意思是PRP contracts costs 弥补了每个产品的总成本的增加, 比如原来要增加20%的总成本, 用PRP contracts costs 后只增加10%. 而 OG说的 Choice B is incorrect because it is a natural consequence of increased worker productivity if other costs remain stable. 是说除PRP contracts costs 以外的其它成本都保持不变的话, 提高员工的生产力自然会弥补了每个产品的总成本的增加. B是无关的支持. 请NN们指教! |