问题：

[单选,材料题] 请在第____处填上正确答案。

A . He says there is emerging evidence that children absorb low—level radiation at a rate more than three times that of adults．
B . By the year 20004 it is estimated that Australia will have 8 million mobile phones：nearly one for every two people．
C . “If mobile phones are found to be dangerous，they should carry a warning label until proper shields can be devised，”he said．
D . Then who finances the research?
E . For example，Telstra，Optus and Vodaphone build their towers where it is geographically suit—able to them and disregard the need of the community．
F . The conclusion is that mobile phones brings more harm than benefit．