这是Ls的一道题：
Animals with a certain behavioral disorder have unusually higt levels of aluminum in their brain tissue. since a silicon-based compound binds to aluminum and prevent it from affecting the brain tissue, animals can be cure of the disorder by being treated with the compound.
The argument is based on which one of the following assumptions?
(B)Aluminum is the cause of the disorder rather than merely an effect of it.
(C)Introducing the compound into the brain tissue has no side effect.
