Which of the following leads to a movement along the supply curve for shredded wheat but does not shift the supply curve for shredded wheat? (以下哪一个导致沿切碎小麦供应曲线的运动,但不会改变切碎的小麦的供应曲线?——中文由在线翻译而来,仅供参考.下同.)
A.
a fall in the price of shredded wheat小麦价格下跌
B.
an increase in the cost of machinery used to shred wheat增加用于粉碎小麦的机械成本
C.
perfect weather conditions that resulted in a large wheat crop完美的天气条件导致了大量的小麦作物
D.
a decrease in the number of shredded wheat producers切碎的小麦生产者数量减少