OE


This strengthen question addresses the conclusion of the passage, which states that "the scientists hypothesized that Alzheimer's disease results when amyloid protein grows in lesions caused by excess aluminum of the brain." The argument presents a causal pattern, assuming that the correlation between Alzheimer's and aluminum is not a coincidence. If this correlation is not a coincidence, then the argument's conclusion is strengthened. Choice (A) is out of scope, as an unusually low concentration of aluminum in other people does not address the correlation. Choice (B) is out of scope, as the argument concludes about a cause of Alzheimer's and choice (B) reverses the cause and effect. Choice (C) is out of scope, as other diseases do not support a cause for Alzheimer's. Choice (D) is out of scope, as a high concentration of aluminum in the water would impact both sets of brains, not only those of the Alzheimer's patients. The correct answer is (E).