问题如下：
Which of the following is least likely to be the source of increase in cost-push inflation
选项：
A. increase in money wage rates.
B. increase in the money prices of raw materials.
C. increase in the labor productivity.
解释：
C is correct.
The increase of cost-push inflation has two main sources : increase in money wage rates and increase in the money prices of raw materials. If the growth rate of labor productivity exceeds that of wages,the price of good would not increase.
考点：cost-push inflation
解析：生产 的成本主要包含两大来源，用人的成本以及原材料的成本。所以工人工资的上涨和原材料价格的上涨会导致成本推动型。所以A,B选项不入选
劳动生产率的提高其实是变相地降低了生产成本，不会引发成本型通胀，所以C选项入选。
A选项是什么意思呢。。。。。。。