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.
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Amuch of the currently uncontrolled dioxins to which North Americans are exposed comes
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Bmuch of the currently uncontrolled dioxins that North Americans are exposed to come
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Cmuch of the dioxins that are currently uncontrolled and that North Americans are exposed to comes
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Dmany of the dioxins that are currently uncontrolled and North Americans are exposed to come
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Emany of the currently uncontrolled dioxins to which North Americans are exposed come
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正确答案: E