求助一道GWD逻辑题，SOS!!!

kissgod23

Until mow, only injectable vaccines against influenza have been available.Parents are reluctant to subject children to the pain of injections, but adults, who are at risk of serious complications from influenza, are commonly vaccinated.A new influenza vaccine, administered painlessly in a nasal spray, is effective for children.However, since children seldom develop serious complications from influenza, no significant public health benefit would result from widespread vaccination of children using the nasal spray.

Which of the following is an assumption on which the argument depends?



A.Any person who has received the injectable vaccine can safely receive the nasal-spray vaccine as well.

B.The new vaccine uses the same mechanism to ward off influenza as jnjectable vaccines do.

C.The injectable vaccine is affordable for all adults.

D.Adults do not contract influenza primarily from children who have influenza.

E.The nasal spray vaccine is mot effective when administered to adults.

答案D。但就是看不出D为什么合理

weijiejing

关键在于题目最后一句话强调"significant public health benefit "
虽然小孩受这个流感的影响不大, 但如果大人受感染的主要途径是和得了流感的小孩接触, 那么为了使公共健康得到最大的益处, 就必须要降低小孩得流感的几率,那就必须要给小孩注射疫苗.
所以, 这里题目的结论是"no significant public health benefit would result from widespread vaccination of children using the nasal spray.", 说明它的hiden promise是成人得流感的主要途径不是和患病的小孩接触...选D...

其他都是无关选项

wodexia52

1楼精彩