In the country of Veltria, the past two years' broad economic recession has included a business downturn in the clothing trade, where sales are down by about 7 percent as compared to two years ago. Clothing wholesalers have found, however, that the proportion of credit extended to retailers that was paid off on time fell sharply in the first year of the recession but returned to its prerecession level in the second year. Which of the following, if true, most helps to explain the change between the first and the second year of the recession in the proportion of credit not paid off on time? (A) The total amount of credit extended to retailers by clothing wholesalers increased between the first year of the recession and the second year. (B) Between the first and second years of the recession, clothing retailers in Veltria saw many of their costs, rent and utilities in particular, increase. (C) Of the considerable number of clothing retailers in Veltria who were having financial difficulties before the start of the recession, virtually all were forced to go out of business during its first year. (D) Clothing retailers in Veltria attempted to stimulate sales in the second year of the recession by discounting merchandise. (E) Relatively recession-proof segments of the clothing trade, such as work clothes, did not suffer any decrease in sales during the first year of the recession. 这道题错选了A。 思路如下： 题目问的是为什么在经济不好，衣服卖不动的情况下，第一年零售商还不上钱第二年就能还上了。讲的是零售商还钱的问题。 当时留下的是A,C,D 排除D是因为觉得，即使刺激销售量衣服打折也不能说明能还上钱。可能打折卖1块，纵使家当全卖了也不够。 排除C是因为觉得， 那些本身经济状况就很差的在第一年被淘汰掉以后，剩下的那些没说经济状况如何啊，如果也不咋地，第二年还是得淘汰啊。 A选项当时觉得，即使credit extended，对pay off on time也无太大用处，但最起码跟原文意思接近。所以选了A。

求问解题过程

老师求问这类题解题思路

老师，请问下右图下边三角形底边4是如何求出来的？

请晓梅老师讲下这道题的做法，我虽然做出来了但花了很长时间

求问解题过程

请徐小梅老师答疑：对B来说是inversely proportional不一定是m/B的形式吧，也有可能是-mB（m>0）的形式，为什么一定要写成两个变量相乘的形式而不是两个变量相加的形式？

这个题当时在C和E犹豫了蛮久，而且我看OG答案里也说C might somewhat help to explain。所以这种选项要去判断呢？怎么能准确的定位到正确答案呢？ 希望张老师回答一下

想问一下老师做这种题的思路 如何在第一时间内能排出D这种和原文意思很相近的选项而锁定正确答案呢？ 希望张老师回答一下

请问老师这道题是选c吗？可以解释一下这道题做题思路吗？

老师这道题是选c吗？可以解释下做题思路吗