Osmotic pressure is
A) the pressure required to stop the flow of solvent from a region of high solute concentration to a region of low solute concentration.
B) the pressure required to stop the rupture of the semipermeable membrane.
C) the pressure required to reverse the flow of solvent through a semipermeable membrane during osmosis.
D) the pressure required to stop the flow of solvent from a region of low solute concentration through a semipermeable membrane into a region of high solute concentration.
E) none of the above
Answer: D