The answer is A. Hope this helps!
<h3>Steps in order fro the formation process of urine</h3>
3) Blood enters the kidneys through the renal artery and branches to reach the glomerulus.
1) Nephron tubules secrete waste products into collecting tubules.
4) The filtrate travels through the renal tubule and useful substances are reabsorbed into the blood.
2) Pressure of the blood forces water and dissolved substances through capillaries and into the Bowman's capsule.
<h3>Explanation</h3>
The Glomerulus filters water and other substances from the bloodstream. According to the requirement of the body, reabsorption moves nutrients and water back into the bloodstream. Urine actually is made up of 95% of water and the other nutrients are waste ions and hydrogen ions.
