The correct option is D Renin
Renin secreted by the juxtaglomerular apparatus regulates the glomerular filtration rate by inducing multi-hormone system i.e. RAAS (Renin-Angiotensin- Aldosterone system). Activation of this system increases the reabsorption rate of sodium and water, making the urine more concentrated.
Alcohol decreases the vasopressin levels which lowers the reabsorption rate of water, making the urine more dilute.
Atrial -natriuretic factor causes vasodilation and acts as a check on RAAS.
caffeine has a diuretic effect and increases the amount of urine made.