Much to your delight, your family puts in a backyard swimming pool and your dog sips from it as it is filled with fresh water. However, much to his dismay, you throw a blue dye tablet in the deep end

As the blue dye slowly disperses from the deep end, your dog drinks farther and farther from where the dye is being introduced. Your dog changes his drinking places because of the blue dye's:
A) Electrostatic pressure.
B) Diffusion gradient
C) Force of diffusion
D) Different polarization of dye versus water

C