Multiple choice

From the time the city administration enforced stringent water contamination guidelines on the local industry; the number of aquatic species seen in the local water bodies has increased dramatically. Similar water contamination guidelines should be imposed in other parts of the country. Each of the following is an assumption made in the argument above EXCEPT

  1. In most parts of the country, water contamination problems are caused almost entirely by the local industry.

  2. Enforcing water contamination guidelines on industry left a significant impact on the quality of water in the local water bodies.

  3. The water contamination problems of the other parts of the country are basically similar to those ones suffered by the city.

  4. An increase in the number of aquatic species seen in the local water bodies is desirable.

  5. The increased number of aquatic species seen in the local water bodies reflects an actual increase in the number of aquatic species in the area.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

We know that water contamination guidelines on the local industry in the city have helped increase the number of aquatic species. It means that the local industry then causes a significant amount of water contamination, so the guidelines may have helped to reduce water contamination. Still, the local industry does not need to be 'entirely' responsible for the water contamination in order for the guidelines to help. Perhaps the local industry only caused 30% of the contamination, but the guidelines cut local industry contamination to zero; that would still have a significant impact on the quality of water. Hence option (1) is correct.

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