Which of the following statements about the production of concentrated urine is NOT true?

A、The accumulation of NaCl in the medullary interstitium depends on the active reabsorption of NaCl by the thick ascending limb;
B、Countercurrent multiplication in the vasa recta helps to prevent washout of the medullary gradients of NaCl and urea;
C、In the presence of ADH urea is reabsorbed from the inner medullary collecting ducts;
D、The descending limb of the loop of Henle is permeable to water