Which one of the following statements concerning the boltzmann distribution is true?
select one
a)the boltzmann equation expresses a statistical population distribution corresponding to maximum entropy
b)the boltzmann equation applies to all systems, whether or not they are in thermal equilibrium
c)the boltzmann distribution is not valid at very low temperatures.
d)upper energy levels are always less populated than lower energy levels, regardless of degeneracy.
e)at room temperature, a boltzmann distribution predicts few rotational levels are populated but many electronic levels.