What is the main idea of the news item？A．Dinosaurs died out 65 million years ago.B．Cause o

What is the main idea of the news item？

A．Dinosaurs died out 65 million years ago.

B．Cause of dinosaur"s extinction is proved.

C．Volcanic eruption is the cause of the dinosaur"s extinction.

D．Scientists are looking for the cause of dinosaur"s extinction.

请帮忙给出正确答案和分析，谢谢！

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