Which Is TRUE Regarding Renal Tubular Reabsorption

Which is TRUE regarding renal tubular reabsorption?

A) Reabsorption of Na+ from the proximal tubule occurs as a result of water reabsorption.
B) Reabsorption of glucose saturates at a maximum transport rate.
C) Urea reabsorption cannot occur at any point along the nephron.
D) Toxic substances are removed from the body by reabsorption from peritubular capillaries into the proxmial tubule.
E) Reabsorption of Na⁺ only occurs from nephron regions that come after the descending limb of the loop of Henle.