
Passage: The brain tissue of animals with behavioral disorders contains large amounts of aluminum. Because a silicon-based compound immobilizes the aluminum and prevents it from affecting brain tissue, this compound could be used to treat behavioral disorders in animals.
Question: The above argument is based on which of the following unstated premises?
A. A.There are no side effects when these silicon-based compounds are introduced into the brain.
B. B.These aluminum elements are the cause, not the result, of behavioral disorders.
C. C.Different species of animals require different amounts of silicon-based compounds for treatment.
D. D.Normal animal brain tissue does not contain aluminum.
Answer: