Which of the Following Most Accurately Describes the Renal Transport

Which of the following most accurately describes the renal transport of Na⁺?

A) Na⁺ is actively transported in all segments of the tubule.
B) Primary active transport of Na⁺ allows for secondary active transport of glucose and H⁺ in the proximal tubule.
C) Most of the Na⁺ transport occurs in the distal convoluted tubule and collecting ducts.
D) Na⁺ is actively secreted into the nephron lumen by cells in the cortical collecting ducts.
E) Na⁺ is actively transported across the luminal membrane of proximal tubule cells in exchange for K⁺, by Na⁺/K⁺ ATPase pumps.