Surfactants Can Form Micelles When Dissolved in Water

Surfactants can form micelles when dissolved in water. Which of the following describes the typical structure of a concentrated surfactant solution?

A) The surfactant molecules accumulate at the surface of the water.
B) The surfactant molecules combine with ion in the water to form spheres.
C) The surfactant molecules self-assemble into spheres where the hydrophobic tails point towards the interior of the sphere.
D) The surfactant molecules self-assemble into spheres where the hydrophobic tails point towards the exterior of the sphere.
E) None of the above.