27. A recent study of ancient clay deposits has provided new evidence supporting the theory of global forest fires ignited by a meteorite impact that contributed to the extinction of the dinosaurs and many other creatures some 65 million years ago. (A) supporting the theory of global forest fires ignited by a meteorite impact that (B) supporting the theory that global forest fires ignited by a meteorite impact (C) that supports the theory of global forest fires that were ignited by a meteorite impact and that (D) in support of the theory that global forest fires were ignited by a meteorite impact and that (E) of support for the theory of a meteorite impact that ignited global forest fires and 没有看明白划线部分的结构，the theory that 后面应该有个从句呀，可是动词在哪里？
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