What Changes Are Seen in Water Balance as We Get

What changes are seen in water balance as we get older?

A) Total body water increases because the kidneys become more efficient.
B) Our thirst mechanism does not work as efficiently so we may forget to drink fluids.
C) Increased intake of water can lead to additional fluid in the lungs, causing pneumonia.
D) In a person confined to bed, water retention can lead to pressure ulcers on the back.