Which of the Following Statements Are True of Tubular Reabsorption

Which of the following statements are true of tubular reabsorption? (Read carefully and select all of the correct statements.)

A) Positive ions are reabsorbed by active transport.
B) Water and negative ions are reabsorbed by osmosis.
C) Cells in the proximal convoluted tubule have cilia to increase their surface area for absorption.
D) Glucose is reabsorbed by active transport and has a threshold level.
E) Water-soluble vitamins are reabsorbed by active transport and do not have threshold levels.
F) Small proteins are reabsorbed by pinocytosis.
G) Approximately 99% of the renal filtrate formed is reabsorbed.
H) Tubular reabsorption takes place from the peritubular capillaries to the renal tubules.