What Happens to Energy in the Sun's Convection Zone

Multiple Choice

What happens to energy in the Sun's convection zone?

A) Energy is transported outward by the rising of hot plasma and sinking of cooler plasma.
B) Energy is produced in the convection zone by thermal radiation.
C) Energy slowly leaks outward through the radiative diffusion of photons that repeatedly bounce off ions and electrons.
D) Energy is produced in the convection zone by nuclear fusion.