有人能帮我把题干的意思表达一下吗？我不明白问题让削弱提干中的那一部分，题干争论的什么呀？谢谢！
124. It is repeatedly claimed that the dumping of nuclear waste poses no treat to people living nearby. If this claim could be made with certainty, there would be no reason for not locating sites in areas of dense population. But the policy of dumping nuclear waste only in the more sparsely populated regions indicates, at the very least, some misgiving about safety on the part of those responsible for policy.
Which one of the following, if true, would most seriously weaken the argument?
(A) Evacuation plants in the event of an accident could not be guaranteed to work perfectly except where the population is small.
(B) In the event of an accident, it is certain that fewer people would be harmed in a sparsely populated than in a densely populated area.
(C) Dumping of nuclear waste poses fewer economic and bureaucratic problems in sparsely populated than in densely populated areas.
(D) There are dangers associated with chemical waste, and it, too, is dumped away from areas of dense population. | 
