图是某种商品从产生到退出市场的价格波动图,当该商品价格从A点

图是某种商品从产生到退出市场的价格波动图,当该商品价格从A点运行到B点,说明

①该商品的社会劳动生产率提高

②该商品的生产者从赚钱到保本经营

③该商品生产者的个别效率从高于到等于社会效率

④生产该商品的社会必要劳动时间减少,价值量降低

A.①②    B.①③    C.①④    D.②④

答案

C


解析:

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