Balance of Energy in the Solar Interior Means That

Balance of energy in the solar interior means that:

A) the energy production rate in the core equals the rate of radiation escaping the Sun's surface.
B) the source of energy in the core is stable and will sustain the Sun for billions of years.
C) the outer layers of the Sun absorb and reemit the radiation from the core at increasingly longer wavelengths.
D) radiation pressure balances the weight of the overlying solar layers.