请教逻辑大全17-9，17-10

9.     A discount retailer of basic household necessities employs thousands of people and pays most of them at the minimum wage rate. Yet following a federally mandated increase of the minimum wage rate that increased the retailer’s operating costs considerably, the retailer’s profits increased markedly.

Which of the following, if true, most helps to resolve the apparent paradox?

(A) Over half of the retailer’s operating costs consist of payroll expenditures; yet only a small percentage of those expenditures go to pay management salaries.

(B) The retailer’s customer base is made up primarily of people who earn, or who depend on the earnings of others who earn, the minimum wage.

(C) The retailer’s operating costs, other than wages, increased substantially after the increase in the minimum wage rate went into effect.

(D) When the increase in the minimum wage rate went into effect, the retailer also raised the wage rate for employees who had been earning just above minimum wage.

(E) The majority of the retailer’s employees work as cashiers, and most cashiers are paid the minimum wage.

答案是B, 原文说：成本提高、利润也提高，那应该是售价也增长呀。B似乎没有体现这一点，请问B是怎么解释原文的矛盾的？

10.   The cotton farms of Country Q became so productive that the market could not absorb all that they produced. Consequently, cotton prices fell. The government tried to boost cotton prices by offering farmers who took 25 percent of their cotton acreage out of production direct support payments up to a specified maximum per farm.

The government’s program, if successful, will not be a net burden on the budget. Which of the following, if true, is the best basis for an explanation of how this could be so?

(A) Depressed cotton prices meant operating losses for cotton farms, and the government lost revenue from taxes on farm profits.

(B) Cotton production in several counties other than Q declined slightly the year that the support-payment program went into effect in Q.

(C) The first year that the support-payment program was in effect, cotton acreage in Q was 5% below its level in the base year for the program.

(D) The specified maximum per farm meant that for very large cotton farms the support payments were less per acre for those acres that were withdrawn from production than they were for smaller farms.

(E) Farmers who wished to qualify for support payments could not use the cotton acreage that was withdrawn from production to grow any other crop.

答案是A，怎么推的？

Thanks a lot!

1、政府提高了最低工资，而这个零售商的客户群主要是低端客户（如A所说），那么他们得收入提高后，对这个零售商得购买能力也提高了。所以收入得上升抵消成本上升得影响后还能得到更高得盈余。

2、政府对棉农得直接支付可以提升棉价，从而可能提升政府在棉花上得税收，进而免补直接支付得支出（这个过程不是很严谨）