Sam,a 50-Year-Old Veteran with a TBI Was Recently Diagnosed with Alzheimer's

Sam,a 50-year-old veteran with a TBI was recently diagnosed with Alzheimer's Disease.His sister asks the nurse,"How can this be an accurate diagnosis? There is no incidence of this in our family." Which of these teaching points is accurate for the nurse to share with Sam's sister?

A) Alzheimer's disease doesn't tend to run in families.
B) Alzheimer's disease is often misdiagnosed in patients with PTSD.
C) Alzheimer's disease is more common in patients with TBI than in the general population.
D) Alzheimer's disease in patients with TBI is not like traditional Alzheimer's disease.