Which of the Following Is the Best Definition of Osmosis

Which of the following is the best definition of osmosis?

A) The net movement of glucose across a selectively permeable membrane.
B) The net movement of any substance down a solute concentration gradient.
C) The net movement of water across a selectively permeable membrane.
D) The net movement of water from a region of high water potential to a region of low water potential.
E) The net movement of water from a region of low water potential to a region of high water potential.