The cost of flood damage since 1980 has been greater in areas that have adopted flood-control measures than in those that have not. Thus, flood-control projects are expensive engineering mistakes and a substantial waste of resources.
Which of the following, if true, would be most damaging to the argument above? (A)Those areas that had not suffered flood damage before 1980 are the only ones that have not adopted flood-control measures (B)Since 1980, those areas that have taken flood-control measures have suffered greater flood damage than they did in the previous decade (C)The cost of flood damage has increased every year since 1980 (D)Faulty engineering has not been the only cause of the failure of flood-control projects (E)The amount of rainfall since 1980 has been substantially greater than normal
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