Question ID:PT23 S3 Q7 Passage:Studies indicate that the rate at which water pollution is increasing is leveling off:  the amount of water pollution caused this year is almost identical to the amount caused last year. If this trend continues, the water pollution problem will no longer be getting more serious.  Stem:The reasoning is questionable because it ignores the possibility that Correct Answer Choice:EChoice A:some types of water pollution have no noticeable effect on organisms that use the water Choice B:the types of water pollution caused this year are less dangerous than those caused last year Choice C:the leveling-off trend of water pollution will not continue Choice D:air and soil pollution are becoming more serious Choice E:the effects of water pollution are cumulative