请教GWD-9-Q12

GWD-9-Q12:

A mosquito bite can transmit to a person the parasite that causes malaria, and the use of mosquito nets over children’s beds can significantly reduce the incidence of malarial infection for children in areas where malaria is common. Yet public health officials are reluctant to recommend the use of mosquito nets over children’s beds in such areas.

Which of the following, if true, would provide the strongest grounds for the public health officials’ reluctance?

A.    Early exposure to malaria increases the body’s resistance to it and results in a lesser likelihood of severe life-threatening episodes of malaria.

B.    Mosquito bites can transmit to people diseases other than malaria.

C.    Mosquito nets provide protection from some insect pests other than mosquitoes.

D.    Although there are vaccines available for many childhood diseases, no vaccine has been developed that is effective against malaria.

E.     The pesticides that are most effective against mosquitoes in regions where malaria is common have significant detrimental effects on human health.

为什么E比D好呢？

我觉得D是 在题意A=>B的基础上说，没有B很严重，所以support

而E是在题意A=>B的基础上说，还有C=>B但不好，所以support

对么？

不明白 文章讲蚊帐答案讲杀虫剂？？

让我选就选A啦 哈哈

明白咯~，E提供了一个alternative solution，所以就weaken另一个solution咯~

谢谢h5641~

这题答案是A好波？