Use Case C to Answer the Following Questions

Use Case C to answer The Following questions
CASE C
A heavy tea drinker just purchased over-the-counter whitening strips to see if her discolored teeth could be whitened. She wants to know if using whitening strips is better than using the professional custom bleaching tray system at home. You want to provide an evidence-based answer (based on a search of the research literature) .
-Which of the following would be an example of a well-developed question to help narrow your research literature search?

A) For clients with discolored teeth, are whitening strips the best method to increase whitening?
B) Are whitening strips the best method to increase whitening?
C) Are whitening strips more effective than custom tray bleaching systems?
D) For clients with tooth discoloration from tea stain, are whitening strips more effective in increasing teeth whitening when compared with professional at-home custom tray bleaching?