The correct answer is: B. scatter light.
Soap micelles are tiny, spherical aggregates of soap molecules that form when soap is dissolved in water. The soap molecules have a long, hydrophobic (water-hating) tail and a short, hydrophilic (water-loving) head. The hydrophobic tails point inward, away from the water, while the hydrophilic heads point outward, towards the water. This arrangement of the soap molecules creates a micelle with a water-filled core and a hydrophobic surface.
When light hits a soap micelle, it is scattered in all directions by the hydrophobic surface of the micelle. This scattering of light is what makes soap solutions appear cloudy.
Refraction is the bending of light as it passes from one medium to another. Diffraction is the bending of light as it passes through a narrow opening or around an obstacle. Polarization is the process of restricting the vibration of light waves to a single plane.
Refraction, diffraction, and polarization are all important phenomena in physics, but they are not the cause of the cloudiness of soap solutions. The cloudiness of soap solutions is caused by the scattering of light by the hydrophobic surface of soap micelles.