Why Does Lettuce Wilt If It Sits in Salad Dressing

Why does lettuce wilt if it sits in salad dressing for awhile?

A) The salt in the dressing pulls the water out of the plant.
B) By osmosis, the water flows down the salt gradient from inside the cell to outside.
C) By active transport, the water flows down the salt gradient from inside the cell to outside.
D) It doesn't, because a cell is impermeable to water so the water doesn't move.
E) By diffusion, salt moves into the cells of the plant.