Nancy is a 45-year-old female who has tooth pain every now and then and is unhappy with the way her teeth look. Her last visit to a dentist was six years ago, at which stage she had no obvious dental disease. Nancy is taking a beta-blocker for hypertension started three years ago by her general practitioner ancy asks you about full-mouth vital tooth bleaching as she has seen advertising which has convinced her that she needs to have it done. If Nancy opts to proceed with this, what is the most appropriate stage of treatment for her to have this done? A. Prior to any other treatment B. Immediately after removal of all calculus C. After the placement of temporary restorations D. After the placement of definitive restorations E. After completing all other treatment