Which of the following is the most relevant rebuttal to the counterclaim? A. Even though they cannot prove the case for cancer yet, is being glued to a radioactive device 24 hours a day really smart? B. While the data from medical research hasn't proven anything conclusively, an increasing number of studies indicate that there is a significant risk. C. Cell phones are not a necessity, so people could learn to moderate use in case their health is at risk. D. Medical research usually takes a long time before it proves anything.

Answer: B. While the data from medical research hasn't proven anything conclusively, an increasing number of studies indicate that there is a significant risk.

This sentence is being used as a rebuttal to a counterclaim. The counterclaim argues that the data from medical research has not proven anything conclusively. The author is addressing this concern, and acepting the truth of the statement. However, he also states that although nothing conclusive has been proven, an increasing number of studies indicate that there is a significant risk. This is an effective response to the counterclaim.