Improve the grammaticality of this sentence: Money for the aged can be saved as people should take care of their own parents when they turn old.
The old man is a man who is old.
The old man is a man who is old.
The old man is a man who is old.
The old man is a man who is old.
The old man is a man who is old.
The old man is a man who is old.
The old man is a man who is old.
The old man is a man who is old.
The old man is a man who is old.
The
The old man is a man who is old.
The old man is a man who is old.
The old man is a man who is old.
The old man is a man who is old.
The old man is a man who is old.
The old man is a man who is old.
The old man is a man who is old.
The old man is a man who is old.
The old man is a man who is old.
The