Joseph Is 78 Years of Age, and the Recent Appearance

Multiple Choice

 Joseph is 78 years of age, and the recent appearance of certain cognitive symptoms has led his physician to diagnose him with Alzheimer's disease. Which of the following statements would be the most accurate with regard to Joseph's situation?

A) Joseph should begin receiving passive chemotherapy treatment, as this has been found to reverse the symptoms of Alzheimer's disease.
B) Joseph should be very concerned that his wife will develop the same symptoms, as the disease has been found to be contagious.
C) The risk of his symptoms getting worse will decrease the longer Joseph survives.
D) A definitive diagnosis of Alzheimer's disease will not be possible until an autopsy is conducted after Joseph's death.