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Although it is the opinion of an expert, aired in a recent radio interview, clearly the statement that our skin should constantly be protected from the sun's rays is inaccurate. There is a possibility that in the next 50 to 100 years the damage done to the ozone layer will have been corrected so that the protection that it once granted us will be restored. However, based on current evidence, harmful UV rays are penetrating our atmosphere. Still, our bodies need sunlight and UV for the synthesis of vitamin D, a vital element in our ability to defend ourselves from a variety of serious illnesses even though the benefits of skin protective products have been proven.
Which of the following, if true, most strongly supports the above conclusion?
This answer choice neither strengthens nor weakens the conclusion. Although it presents a few details about the sun's rays and sunscreen lotion, it doesn't tell us anything thing that favors either side.
This answer choice neither strengthens nor weakens the conclusion. The fact that UVA and UVB rays have negative effects is not the issue in question. The opinion being argued against is that we should constantly use protection against such rays.
This answer choice neither strengthens nor weakens the conclusion. The fact that ultraviolet light is a dangerous thing in our current ozone-depleted situation is not at question here. The expert's opinion is that we should always, or constantly, be protecting ourselves from sunlight. The conclusion that we're supposed to be supporting opposes this opinion.
This answer choice neither strengthens nor weakens the conclusion since it revolves around refuting parameters that are irrelevant to the argument anyway. Since we are in search of parameters that are directly related to ultraviolet light, this statement is beside the point.
This answer choice strengthens the conclusion that the expert's opinion is inaccurate in two ways. Firstly, it tells us of a disease that is caused by not getting enough vitamin D which we are told by the premises is created by ultraviolet exposure. Secondly, it links ultraviolet light to the curing of the disease, showing that it is actually a necessary factor in the human biological system.