Ruthie is an elderly woman and has a very high fever. she normally is pretty sharp, but with this high fever she seems to be almost out of her mind. she doesn't remember what she is doing, can't sustain a conversation, and is generally confused about any decisions that have to be made. a week or so later, the fever subsides and ruthie seems back to her normal self. while the fever was high, ruthie experienced a. parkinson's disease. b. delirium. c. dementia. d. alzheimer's disease.

While she had a high fever Ruthie experienced Option B. delirium.

Explanation:

We know that Ruthie experienced delirium and none of the other conditions listed because her altered mental capacity and state was just temporary.  The other conditions listed are chronic diseases that are not curable in the case of Alzheimer's and Parkinson's, and dementia is an umbrella term for different neurological degenerations (including Alzheimer's which can cause dementia) generally progressive and degenerative, although some early cases can be treated and prevented from advancing more rapidly depending on the cause.

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