A report by the American Academy for the Advancement of Science has concluded that much of the currently uncontrolled dioxins to which North Americans are exposed comes from the incineration of wastes.
(A)much of the currently uncontrolled dioxins to which North Americans are exposed comes
(B)much of the currently uncontrolled dioxins that North Americans are exposed to come
(C)much of the dioxins that are currently uncontrolled and that North Americans are exposed to comes
(D)many of the dioxins that are currently uncontrolled and North Americans are exposed to come
(E)many of the currently uncontrolled dioxins to which North Americans are exposed come
题目分析：A中用much修饰一个可数名词（dioxins），不可以，只有many可以修士可数名词。同理干掉BC。D连谓语都没有，选E
