Which of the following is a feature of elderly people and water metabolism

a.They may not feel thirsty or recognize dryness of the mouth.
b.They have a higher total body water content compared with younger adults.
c.They show increased frequency of urination, which results in higher requirements.
d.They frequently show symptoms of overhydration such as mental lapses and disorientation.
e.Overhydration increases risk of pressure ulcers and urinary tract infections.