Which Statement About Insect Excretory Systems Is False

Which statement about insect excretory systems is false?

A) Uric acid, sodium ions, and potassium ions passively diffuse from extracellular fluid into the Malpighian tubules.
B) Water moves into Malpighian tubules because of the high concentration of solutes inside the tubules.
C) Water returns to the extracellular fluid across the walls of the rectum.
D) Excretion of uric acid conserves water and allows insects to live in very arid environments.
E) Epithelial cells of the hindgut and rectum actively transport sodium and potassium ions back into the extracellular fluid.