新GRE一道小阅读逻辑推理题,7.( 逻辑题)Even after numerous products made wit

新GRE一道小阅读逻辑推理题,
7.( 逻辑题)
Even after numerous products made with artificial sweeteners became available,sugar consumption per capita continued to rise.Now manufacturers are introducing fat-free versions of various foods that they claim have the taste and texture of the traditional high-fat versions.Even if the manufacturers’s claim is true,given that the availability of sugar-free foods did not reduce sugar consumption,it is unlikely that the availability of these fat-free foods will reduce fat consumption.
Which of the following,if true,most seriously undermines the argument?
A several kinds of fat substitute are available to manufacturers,each of which gives a noticeably different taste and texture to products that contain it.
B the products made with artificial sweeteners did not taste like products made with sugar.
C the foods brought out in sugar-free versions did not generally have reduced levels of fat,but many of the fat-free versions about to be introduced are low in sugar.
D people who regularly consume products containing artificial sweeteners are more likely than others to consume fat-free foods.
E not all foods containing fat can be produced in fat-free versions.
答案是什么/为什么?