If a Shallow Pan Is Filled with Water, a Drop

If a shallow pan is filled with water, a drop of red ink is placed in one end of the pan, and a drop of green ink is placed in the other end, which of the following will be true at equilibrium?

A) The red ink will be uniformly distributed in one half of the pan, and the green ink will be uniformly distributed in the other half of the pan.
B) The red and green inks will be uniformly distributed throughout the pan.
C) Each ink will move down its concentration gradient.
D) The concentration of each ink will be higher at one end of the pan than at the other end.
E) No predictions can be made without knowing the molecular weights of the pigment molecules.