When a Human Cell Is Placed into Water, It Swells

When a human cell is placed into water, it swells. This is said to be due to osmosis. What's happening to make the cell swell?

A) Water is diffusing across the plasma membrane from a region of high (outside the cell) to low (inside the cell) "free" water concentration.
B) Water is being pulled into the cell by the cell's solutes.
C) Water is diffusing across the plasma membrane from a region of low (outside the cell) to high (inside the cell) "free" water concentration.
D) Solutes are being drawn into the cell across the plasma membrane.
E) The cell synthesizes new biological macromolecules as a protective response against a watery environment.