36. which statement is true? a. one radiograph should be obtained to complement visual assessments, for example, gingival index, periodontal probing depth, or periodontal/clinical attachment level. b. full oral examination is only possible without general anesthesia. c. oral examination should proceed in an orderly and structured fashion, using appropriate instrumentation. d. adequate recording should take place at the end of the prophy, preferably on published or adapted dental charting systems.