有一道SAT题 麻烦了( One important cause of the medication shortage
有一道SAT题 麻烦了
( One important cause of the medication shortage is when ) healthy people, attempting to vuild up immunity, take medications that are intended to treat illnesses.
改为
A~ One important cause of the medication shortage is that
B~ Most medication shortages are the result of that
C~ Most medication shortages result from when
哪两个不对,麻烦解读一下为什么,谢谢各位高手相助了,有追加