Answer:
The correct answer is: increase the amount of aldosterone and decrease ADH.
Step-by-step explanation:
ADH is a hormone produced in the pituitary gland that is responsible for fluid retention. To achieve this, ADH works by reabsorbing water, which concentrates the urine and decreases its volume. The water will be reabsorbed into the blood vessels which will increase the volume of blood.
Aldosterone, on the other hand, is produced in the adrenal gland and has the function to increase sodium uptake and potassium secretion.
If the objective is to reabsorb sodium without increasing the volume of blood, aldosterone should be increased and ADH should be decreased.