Answer:
The answer is B. descending loop of henle.
Explanation:
Most of the filtrate water is reabsorbed at the level of the DESCENDING LOOP OF HENLE. This branch has a wide cortical zone and an extreme spinal cord; It has low permeability to ions and urea, but is very permeable to water; there are a few channels of aquapurine type 1 that absorb 20% of the filtered water.