Which Statement About Protonephridia in a Freshwater Flatworm Is False

Which statement about protonephridia in a freshwater flatworm is false?

A) A protonephridium consists of a flame cell and tubule.
B) Extracellular fluid moves into a protonephridium because pressure is lower inside the tubule than it is outside it.
C) Tubule cells reabsorb solutes.
D) Fewer ions are reabsorbed than secreted.
E) Filtrate flows out the excretory pore.