Refer to the Figure of the Countercurrent Multiplier Mechanism in the Mammalian

Refer to the figure of the countercurrent multiplier mechanism in the mammalian kidney. Based on the figure, which statement is true?

A) Water leaves the tubule by active transport at points 2, 3, and 5.
B) Water enters the tubule by osmosis at point 3.
C) Sodium chloride leaves the tubule by diffusion at points 1 and 3.
D) Sodium chloride leaves the tubule by active transport at point 6.
E) Urea leaves the tubule by diffusion at point 6.