How Can "Normal" Memory Lapses and Dementia Be Distinguished

How can "normal" memory lapses and dementia be distinguished?

A) With normal memory lapses, the person is much older than someone with dementia
B) In dementia, the memory does not return spontaneously and may not respond to memory cues
C) With normal memory lapses, the person may not respond to memory cues
D) In dementia, the memory loss is associated with psychological effects of stress