Final answer:
For those showing signs of dementia, the severity and persistence of symptoms such as disruptive memory loss and confusion are critical indicators. Professional medical evaluation is necessary to differentiate between normal aging and potential Alzheimer's disease.
Step-by-step explanation:
When considering which person should be most concerned about the signs of Alzheimer's disease and dementia, it is essential to look at the severity and persistence of their symptoms. Common signs to be wary of include disruptive memory loss, confusion about time or place, substantial difficulty with planning or executing tasks, poor judgment, and prominent personality changes.
If someone like the hypothetical Rosa shows these symptoms, coupled with trouble in managing a budget or becoming disoriented in a familiar place, these could be indicative of more than normal aging. It's crucial to note that problems with smelling certain scents can also be an early warning sign of Alzheimer's.
Given that Alzheimer's is a type of dementia initially studied by medical researcher Solomon Carter Fuller and is a leading cause of dementia among the elderly, professional medical evaluation is necessary to distinguish between typical age-related changes and the onset of Alzheimer's.