The correct answer is B. None.
Absolute zero is the lowest temperature possible, at which all molecular motion ceases. At absolute zero, there is no thermal energy to produce radiant energy.
Option A is incorrect because the maximum theoretical amount of radiant energy is emitted by an object at a temperature of absolute zero.
Option C is incorrect because an object at absolute zero will not emit any radiant energy.
Option D is incorrect because the chemical composition of an object does not affect the amount of radiant energy it emits at absolute zero.