Regina is writing an argument against adding fluoride to the city's drinking water. Which statement best introduces the topic?

A. Even the Food and Drug Administration would agree that we are flooded with toxins and chemicals; therefore,
we should carefully consider the facts before adding more fluoride to our drinking water.
B. Adding a known drug to our drinking water is not responsible, and a lot of people agree with me on this issue;
even the Food and Drug Administration has admitted that fluoride is a drug subject to regulation.
C. The Food and Drug Administration stated in 2000 that fluoride is a drug subject to regulation when it is "used
in the diagnosis, cure, mitigation, treatment, or prevention of disease in man or animal" and, therefore,
deserves careful attention as we consider adding it to our water supply.
D. Because the Food and Drug Administration has stated in 2000 that fluoride is a drug subject to regulation
when it is used in the diagnosis, cure, mitigation, treatment, or prevention of disease in man or animal," we
would be pathetically misguided to put it in our water supply.