How Are Alzheimer's Disease and Vascular Neurocognitive Disorder Identified

How are Alzheimer's disease and vascular neurocognitive disorder identified?

A) Vascular neurocognitive disorder has a more rapid onset and patients suffer a much more rapid demise than with the other forms of neurocognitive disorder.
B) Vascular neurocognitive disorder has a more rapid onset than neurocognitive disorder due to Alzheimer's disease, although the course and outcome are similar.
C) Vascular neurocognitive disorder has a much slower onset than neurocognitive disorder due to Alzheimer's disease, but patients suffer a much more rapid demise than with the other forms of neurocognitive disorder.
D) Vascular neurocognitive disorder has a more rapid onset and results in fewer deficits than neurocognitive disorder due to Alzheimer's disease.