Stem cells are found throughout the body and have fascinated scientists because of their ability to become any type of cell, which means that they have the potential to repair or replace damaged tissues. Laser stimulation of stem cell growth is likely to achieve tissue growth, so research People believe that laser technology may be a transformative tool in the medical field. Which of the following, if true, would best support the above conclusion? ['The principle of the action of lasers of different wavelengths on body tissues is unclear.', "Cases have shown that lasers can damage children's retina and affect vision.", 'Currently, the laser stimulated growth method has not been tested on the human body, and the risk has yet to be evaluated.', 'Using a laser to treat molars with cavities, the damaged dental tissue can gradually recover.']