请问新东方白色语法书的103题怎么解释啊?

谢谢

题目是:

one of Ronald reagan`s first acts as president was to rescind President Carter`s directive that any chemical banned on medical grounds in United states be prohibited from sale to other countries.

a.that any chemical banned on medical grounds in United States be prohibited from sal to other countyies

b.that any chemical be prohibited from sale to other countries that was banned on medical grounds in the United states

c.prohibiting that any chemical banned on medical grounds in the united States is sold to other countries

e.that any chemical banned in the United States on medical grounds is prohibited from being sold to other countries.