People believe that cellphones cause cancer, especially brain cancer. A few studies suggested a link with certain rare types of brain tumours __________. These studies didn't receive front-page coverage. Therefore, most consumers could not notice them.

• A. Using a cell phone while driving increases the risk of having a car accident
• B. Keeping your hands free and your eyes on the road is a more significant issue
• C. Lower frequency radiation has not been proven to cause these DNA changes
• D. But most studies show that there is no link between cell phone use and brain cancer