Photodynamic Disinfection Therapy Is a Three-Stage System to Inactivate Subgingival

Photodynamic disinfection therapy is a three-stage system to inactivate subgingival microorganisms; the first step is the application of a nonthermal diode laser light to illuminate the are a.

A) Both statements are true.
B) Both statements are false.
C) The first statement is true, and the second statement is false.
D) The first statement is false, and the second statement is true.