Which of the following is true about the application of bleaching solutions?

The correct answer highlights that the application of bleaching solutions must be performed with monitoring by a licensed professional. This is significant because the application of bleaching agents involves complexities that can impact the safety and efficacy of the treatment. The use of these solutions can lead to adverse effects if not managed correctly, such as sensitivity or chemical burns. Consequently, Florida dental hygiene regulations stipulate that a licensed professional must oversee the procedure to ensure the patient's safety and that best practices are followed.

In contrast, other options do not align with the established guidelines or clinical standards. Allowing dental hygienists to apply bleaching solutions without supervision could lead to potential risks for patients, as proper assessment and monitoring are necessary during the bleaching process. Additionally, the notion that the task is simple and requires no prior training undermines the critical understanding of dental materials and patient care that dental professionals must possess. Lastly, limiting the application of bleaching solutions to only during patient follow-ups disregards the various circumstances under which such treatments may be appropriately applied, emphasizing the role of professional oversight instead.