Hi gmatmachoman,
At any rate, choice D resolves the paradox: if a whole bunch of companies were exempt from measures that were supposed to stop them from polluting, it explains why pollutant levels were high up until and including 1988. Then, in 1989, after the scandal was exposed, these industries were no longer exempt from these measures, and so they had to abide by them--and that explains why the number of smog alerts declined.
Choice B does not resolve because increased accuracy could mean detecting previously undetectable ozone and carbon monoxide particles OR it could mean a reduced rate of mistakenly identifying particles as ozone and carbon monoxide even though they are not ozone and carbon monoxide. On the former interpretation, the paradox is deepened while on the latter interpretation, the paradox is resolved.
At any rate, choice D resolves the paradox: if a whole bunch of companies were exempt from measures that were supposed to stop them from polluting, it explains why pollutant levels were high up until and including 1988. Then, in 1989, after the scandal was exposed, these industries were no longer exempt from these measures, and so they had to abide by them--and that explains why the number of smog alerts declined.
Choice B does not resolve because increased accuracy could mean detecting previously undetectable ozone and carbon monoxide particles OR it could mean a reduced rate of mistakenly identifying particles as ozone and carbon monoxide even though they are not ozone and carbon monoxide. On the former interpretation, the paradox is deepened while on the latter interpretation, the paradox is resolved.
Kaplan Teacher in Toronto
