Fluorescence Is:
A)a Nonradiative Transition Between States with the Same $\rightarrow$

Fluorescence is:

A) a nonradiative transition between states with the same spin,S₁ $\rightarrow$ S₀.
B) a nonradiative transition between states with different spin,T₁ $\rightarrow$ S₀
C) the emission of a photon during a transition between states with the same spin,S₁ $\rightarrow$ S₀.
D) the emission of a photon during a transition between states with different spin,T₁ $\rightarrow$ S₀
E) None of these answers defines fluorescence.