According to gerontologists, individuals who are counted among the "oldest old" are at least years old. 75

I believe the answer is: 85 years old

The term oldest old in this context refers to age group that almost at the end of their lifespan. This group has the characteristic of having Maximum life experience,  depleting physical power, deteriorating mental capacity, much more prone to chronic diseases, and little to no economic productivity.

The correct answer is: their civil liberties have been protected, but their civil rights are less clear apex. hope this .