Which Is the Best Definition of Osmosis

Which is the best definition of osmosis?

A) The movement of molecules from an area of their higher concentration to an area of their lower concentration.
B) The movement of water across a semipermeable membrane from an area of higher water concentration to an area of lower water concentration.
C) The movement of molecules from an area of their lower concentration to an area of their higher concentration.
D) The movement of water across a semipermeable membrane from an area of lower water concentration to an area of higher water concentration.
E) The movement of a substance against its concentration gradient through the release of energy from ATP.