Why phosphorescence measurements are usually made at a low temperature?

Question: Why phosphorescence measurements are usually made at a low temperature?
[A].

To prevent thermal degradation of the phosphorescent species

[B].

To promote phosphorescence by slowing the rate of radiationless transfer processes

[C].

To increase the efficiency of the detector

[D].

To decease the efficiency of detector

Answer: Option B

Explanation:

No answer description available for this question.