Problem: Harold, a 74-year-old patient, is brought to your office by his daughter, who reports that her father has been exhibiting several concerning symptoms over the past year. Comprehensive questioning reveals that his symptoms are: trouble remembering familiar things, such as telephone numbers commonly dialed; not recognizing some close family members who visit often; and difficulty performing writing tasks. The patient's motor function appears to be unaffected. Although not definitive, these symptoms are most likely indicative of which type of dementia? A. Alzheimer's disease B. Frontotemporal dementia C. Huntington's disease D. Wernicke's Encephalopathy