5. 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. C--àB
(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