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题库 / GMATLA-CR-67
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?
Early exposure to malaria increases the body's resistance to it and results in a lesser likelihood of severe life-threatening episodes of malaria.
Mosquito bites can transmit to people diseases other than malaria.
Mosquito nets provide protection from some insect pests other than mosquitoes.
Although there are vaccines available for many childhood diseases, no vaccine has been developed that is effective against malaria.
The pesticides that are most effective against mosquitoes in regions where malaria is common have significant detrimental effects on human health.
但是发现违背了premise 肯定错
A选项说早暴露有抵抗力
C选项说蚊帐可以为除了蚊子之外的其他昆虫提供保护，但是这【违背了题干的premise】（ 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.）
问最强的根据来支持为啥官方不愿意推荐蚊帐：
答案A的意思是：早暴露在malaria的环境，可以增加抵抗力，减少得因malaria造成的重大疾病
就是 CQ1 其他原因
P：mosquito nets over children's beds can significantly reduce the incidence of malarial infection
蚊帐能减少儿童疟疾
C：政府不愿意推荐蚊帐
问加强，相当于：解释这个转折
A：因为小时候得疟疾能加强抵抗力，正确