Refer to the Figure Shown

Refer to the figure shown. Assume that the two pistons have the same mass and move without friction, the center membrane in the diagram is permeable only to water, and solutes are shaded according to concentration (the darker the shading, the higher the concentration) .
If the diagram represents the starting condition, what will occur as the solutions achieve equilibrium?

A) The left piston will move up.
B) The solutes will move but the pistons will not.
C) The right piston will move up.
D) The solutes will move to the left.