By analyzing the garbage of a large number of average-sized households, a group of modern urban anthropologists has found that a household discards less food the more standardized—made up of canned and prepackaged foods—its diet is. The more standardized a household’s diet is, however, the greater the quantities of fresh produce the household throws away.

Which of the following can be properly inferred from the passage?

(A) An increasing number of households rely on a highly standardized diet.

(B) The less standardized a household’s diet is, the more nonfood waste the household discards.

(C) The less standardized a household’s diet is, the smaller is the proportion of fresh produce in the household’s food waste.

(D) The less standardized a household’s diet is, the more canned and prepackaged foods the household discards as waste.

(E) The more fresh produce a household buys, the more fresh produce it throws away.

搞不懂，答案选C，可是我看不出题目里有proportion的暗示。

题设一：标准食品越多，丢的食物越少。

题设二：标准食品越多，丢的新鲜食物数量越多。

请看C：我用公式来证明：

按照题意：propotion=丢弃的新鲜食品/总共丢弃的食品。当标准的食品越少，分母（由题设一推出）变大，分子（由题设二推出）变小。ok，总的就是propotion变小。