不是很理解为啥这题的两个描述都和成本上升有关。。。

NO.PZ2017100901000028 问题如下 economist expects the following:• The cline in the unemployment rate will result in higher revenues for home retailers.• A tighter labor market will put upwarpressure on wages, compelling home retailers to raise prices. Whitype of inflation best correspon to the economist’s expectations? A.Stagflation B.Cost-push inflation C.manpull inflation B is correct.Cost-push inflation refers to the situation in whirising costs, usually wages, compel businesses to raise prices.考点 cost-push inflation解析题目描述的情况都涉及增加工资的情况，上涨的工资会抬升人力成本劲儿提升人力成本。这就会造成 cost-push inflation。 为什么不是工人的工资高了住房需求增加，所以房价才上涨？我理解一般租房的人不需要雇佣工人呀，出租房屋的成本大部分不应该来源于房价本身吗？工人就不在他的成本结构里面

NO.PZ2017100901000028问题如下economist expects the following:• The cline in the unemployment rate will result in higher revenues for home retailers.• A tighter labor market will put upwarpressure on wages, compelling home retailers to raise prices. Whitype of inflation best correspon to the economist’s expectations? A.Stagflation B.Cost-push inflation C.manpull inflation B is correct.Cost-push inflation refers to the situation in whirising costs, usually wages, compel businesses to raise prices.考点 cost-push inflation解析题目描述的情况都涉及增加工资的情况，上涨的工资会抬升人力成本劲儿提升人力成本。这就会造成 cost-push inflation。 第一个条件并看不出来有提升人力成本的感觉。更像降低失业率增加收入水平，manpull

Cost-push inflation manpull inflation B is correct. Cost-push inflation refers to the situation in whirising costs, usually wages, compel businesses to raise prices. 考点 cost-push inflation 解析题目描述的情况都涉及增加工资的情况，上涨的工资会抬升人力成本劲儿提升人力成本。这就会造成 cost-push inflation。 tighter labor market是什么意思？是就业率高了还是低了？谢谢

题目中的第一句话cline in the unemployment rate will result in higher revenues for home retailers?怎么理解呢