969Which is NOT true of bladder cancer？ 查看材料A.It is t8076

Which is NOT true of bladder cancer？ 查看材料 A.It is the 9th most common cancer worldwide. B.It can be identified only by dogs. C.It kills more than 100，000 people each year. D.It is mainly caused by smoking. 请帮忙给出正确答案和分析，谢谢！