Which statement regarding radiation and cancer risk is empirically supported?
A) Low-frequency radiation from microwaves,electricity,and radios presents a significant health risk.
B) Ultraviolet B rays can damage DNA and are responsible for more than 90% of all skin cancers.
C) Toxic wastes in dump facilities do not pose serious health risks.
D) Cancer rates of people who live in countries without nuclear power plants are significantly lower than in the United States.
