求教逻辑狗狗第8题，ＮＮ指点一下

阿窈

8．幼虫larva题-----原题

V1 有道gwd的逻辑，就是larva那个的支持题，选只在幼虫阶段吃一次什么的那个

Lyme disease is caused by a bacterium transmitted to humans by deer ticks. Generally deer ticks pick up the bacterium while in the larval stage from feeding on infected white-footed mice. However, certain other species on which the larvae feed do not harbor the bacterium. Therefore, if the population of these other species were increased, the number of ticks acquiring the bacterium and hence the number of people contracting Lyme disease would likely decline.

Which of the following, if true, most strengthens the argument?





Ticks do not suffer any adverse consequences from carrying the bacterium that causes Lyme disease in humans.



There are no known cases of a human’s contracting Lyme disease through contact with white-footed mice.



A deer tick feeds only once while in the larval stage.



A single host animal can be the source of bacterium for many tick larvae.



None of the other species on which deer tick larvae feed harbor other bacteria that ticks transmit to humans


就是想不明白这个Ｃ哪里起到加强作用拉～～

graceguo98

EV 1: deer tick larval 幼虫的时候吃白脚鼠携带了一些bacterium .
EV2: bacterium 引起Lyme disease 传播给人类
Ev3 :增加其他物种，
Con： tick 携带细菌的数量和人类传染lyme 疾病就可能下降
设想如果幼虫阶段天天吃这种带病菌的老鼠，在增加其他物种也没有用。
也就是说，其他物种增加了其他物种也吃白脚鼠，其他物种不会传染给人类；而幼虫deer tick(其实就是一种像草爬子或者跳蚤之类的小东西)只吃一次， 传染给人类的数量就会减少啊
不知道说清楚了吗