请教PREP07 SC 128

iamdby

A Food and Drug Administration rule implemented in December 2000 mandates that any new drug

that they intend to be used both by adults and children must undergo pediatric study and that its

manufacturers list children's doses on the label.



(A) drug that they intend to be used both by adults and children must

(B) drug whose intended use is for adults and children as well

(C) drug intended for use by both adults and children

(D) drug, if they intend that it be used by adults and also children, must

(E) drug, if intended for use both by adults and children, must



正确答案是C，我的问题是为什么没有must了？难道是为了跟and that its manufacturers list children's doses on the label 平行么？可这样不是改变原句的语气了么？话说情态动词不是最好不要随便去掉么？

iamdby

Oh yeah! 我明白啦！ Mandate: formal to tell someone that they must do a particular thing ,与must意思重复啦！must应该去掉