Decide which of the following is common knowledge and needs no referencing.
A.A. There have been about 400. cancer deaths among 100.,000. Japanese nuclear bomb survivors. B.The negative effects of GM crops have been shown on animals in many studies. C.The Big Bang theory posits that the universe began billions of years ago with an enormous explosion. D.Generally, there are two kinds of light pollution: ecological pollution and astronomical light pollution.正确答案C
