I need help!

tingting85114

Until now, only injectable vaccines against influenza have been available.  arents 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.

I got it wrong

zkybq

假设1：家长得病比孩子更危险
假设2：nasal spray对孩子有效
结论：用nasal spray没有好处
GAP很明显：nasal spray的使用不会对孩子和家长有益
答案：Adults do not contract influenza primarily from children who have influenza.
典型的not+weaken，去掉not，孩子传染家长，孩子不打疫苗，家长也会得病，危险，削弱。

tingting85114

Thanks for the explanation! I am so bad at such types of questions