关于prep笔记1-141的疑问，请各位帮忙，不胜感激！

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Prep1-141.(32450-!-item-!-188;#058&006160)

The federal rules aimed at protecting human subjects of medical experiments were established to ensure that patients must be warned of potential risks and an independent panel would evaluate the experiment before it was conducted.

(A) must be warned of potential risks and an independent panel would

(B) must be warned of potential risks and that an independent panel

(C) are warned about potential risks and that an independent panel

(D) will be warned about potential risks and an independent panel would

(E) would be warned of potential risks and that an independent panel would

疑问：对于A选项中and后面必须有that么？是否可以理解成前面ensure that引导的宾语从句中两个并列的成分呢？？

lxw19

A中的两个成分也不并列啊~~前面没有用would，后面用了