Answer: fluorescent
Explanation:
Emitting visible light as a result of the excitation of phosphors by ultraviolet photons produced by the passage of an electrical current through an inert gas infused with mercury” is the definition of florescent.
Florescent makes visible light through fluorescence. Fluorescence simply deals with how light is emitted through a substance which has absorbed light.
I'm not sure I understand the question, but the grammatically correct answer is A.) Louder.
