While the Topical Application of Fluoride to Children's Teeth Can

Multiple Choice

While the topical application of fluoride to children's teeth can help reduce decay, the addition of fluoride to drinking water is definitely not a good idea. Fluoride in drinking water has caused widespread dental fluorosis (mottled and discolored enamel) , it is a cumulative poison, which means that it builds up in bone and tissue, and it has been linked to lower IQ in children and to Alzheimer's disease in adults.

A) Argument; conclusion: The addition of fluoride ... not a good idea.
B) Argument; conclusion: Fluoride is a cumulative poison.
C) Nonargument.
D) Argument; conclusion: The topical application of fluoride ... reduce decay.
E) Argument; conclusion: It has been linked ... Alzheimer's disease in adults.