i believe the answer is B. According to ars.usda.gov "Solid fats are solid at room temperature, and added sugars are those added to foods—they are nicknamed "SoFAS" by some nutritionists. These SoFAS are also known as "empty calories," according to the 2010 Dietary Guidelines for Americans (DGAs), because they provide few or no nutrients yet are high in calories." Since these are "empty calories" that means that they are high in calories and low in nutrients.
I would have to say the answer is C.
A is incorrect since hydrogen is not an air pollutant.
B is incorrect because ozone is most definitely one of the top.
And D has cyanide which is a chemical for suicide during wars.
Hope this helps!
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