Which of the Following Statements BEST Describes the Term Bulk

Which of the following statements BEST describes the term bulk flow?

A) It is the process in which substances pass across capillary walls by being enclosed in tiny vesicles.
B) It is the osmosis of large quantities of fluids and solutes from capillary walls to surrounding tissues.
C) It is the movement of large numbers of ions, molecules, or particles in the same direction.
D) It is the movement of substances from blood into capillaries against the pressure gradient.
E) It is the process by which solute exchange takes placed between blood and interstitial fluid.