In 1980 there was growing concern that the protective ozone layer over the Antarctic might be decreasing and thereby ...
tomgbeanSeptember 27, 2019
I chose B
I chose B because I couldn't find an answer that made sense and I thought B made the most sense. I did not choose D because even if some ozone shifted from the arctic region to another region, the total global ozone remaining constant is not challenged. It just says that it shifts from one region to another occasionally, leaving the global total to be the same.
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The first think I noticed upon reading this passage, is that the parties involved are talking about two different things: ozone above Antarctica vs. global ozone levels. When you see a discrepancy like this, you should immediately expect to be tested on it.
Growing concern stated that the ozone above Antarctica might be decreasing, which would harm marine life.
Some officials dismissed these concerns, saying that global ozone levels remained constant.
Did the officials effectively refute these concerns? I don't think they did, because they did not address the ozone above Antarctica. The growing concern had nothing to do with global ozone levels. The officials assume that these are the same thing.
We are asked to weaken the officials' argument, and answer choice D gives us the exact flaw that I described above. The scenario demonstrates how global ozone could remain constant, while doing nothing to diminish the growing concerns.
