Answer: a) Monitor intake and output.
Explanation:
Dehydration is a medical condition in which the loss of body fluids occurs. In this condition, the loss of fluid is more than the intake. The excess heat, excessive activity, excessive sweating and side effects of medication all are responsible for dehydration.
In the given condition, the close monitoring of the fluid is essential. The rate of fluid intake and output should be monitored thoroughly. This is because older adults have reduced the ability of the heart to manage the shifts in fluid load demands.