In Carrying Energy Through the Interior of the Sun, There

In carrying energy through the interior of the Sun, there are many collisions between particles (photons, ions, atoms) . What is the net direction of the energy flow in these collisions?

A) The collisions are random, the energy flows equally in all directions, and it is only by chance that some photons carry energy out of the Sun.
B) The collisions generally result in energy flow from the core, where temperatures are higher and the particles are moving faster, toward the outer layers where temperatures are lower and particles are moving more slowly.
C) The collisions generally result in energy flow from the core, where particles are more massive and thus carrying more energy, toward the outer layers where particles are less massive and thus carry less energy.
D) Because of the higher temperatures toward the core, the particles there are mostly ionized. The electric charge of these ionized particles repels particles from farther out from penetrating the core. Thus, energy flow is primarily outward.