好动是许多儿童特别是男孩子的天性。但多动症是一种病态，是一种行为障碍。有的病理学家猜测，摄入超量的食品添加剂是诱发儿童多动症的一个原因。为了验证这一猜测，某专家小组选择了一组好动的男孩，他们摄人的食品添加剂都超出正常标准。他们被安排在一个专门的环境中离开父母集体生活一周，实验的主要内容是减少他们每天的食品添加剂摄入量。结果，其中有多动行为障碍的比例，由一开始的60％降低为30％。这一实验结果说明，上述病理学家的猜测是成立的。
假设上述专家具有准确辨别行为障碍的能力，为对上述实验结论作出评价，回答以下哪个问题最为相关?

A 20％ B 25％ C 22％ D 15％ E 12％

A 2015 B 2016 C 2017 D 2018 E 2019

A 24 B 32 C 35 D 40 E 50

A <img width="27" height="58" src="https://www.beizhujiaoyu.com/uploads/202208/20220217184314_4462.jpg" /> B <img width="27" height="58" src="https://www.beizhujiaoyu.com/uploads/202208/20220217184315_8768.jpg" /> C <img width="27" height="58" src="https://www.beizhujiaoyu.com/uploads/202208/20220217184316_9930.jpg" /> D 4 E 5

A 4 B 5 C 6 D 7 E 8

A 2 B <img src="https://www.beizhujiaoyu.com/uploads/202208/165235461343591.png" width="38" height="17" /> C <img src="https://www.beizhujiaoyu.com/uploads/202208/165235461813401.png" width="20" height="17" /> D <img src="https://www.beizhujiaoyu.com/uploads/202208/165235462397731.png" width="36" height="17" /> E <img src="https://www.beizhujiaoyu.com/uploads/202208/165235462711331.png" width="71" height="18" />

A <img width="27" height="58" src="https://www.beizhujiaoyu.com/uploads/202208/20220217184331_4462.jpg" /> B <img width="26" height="58" src="https://www.beizhujiaoyu.com/uploads/202208/20220217184334_3681.jpg" /> C <img width="40" height="58" src="https://www.beizhujiaoyu.com/uploads/202208/20220217184334_5243.jpg" /> D <img width="27" height="58" src="https://www.beizhujiaoyu.com/uploads/202208/20220217184336_4930.jpg" /> E <img width="40" height="58" src="https://www.beizhujiaoyu.com/uploads/202208/20220217184336_6493.jpg" />

A 2 B 2．4 C 3 D 3．6 E 4．2

A 80 B 120 C 160 D 200 E 240

A -6 B -9 C 6 D 9 E 0