Awriter is working on an essay about the importance of regular dental check-ups. which sentence below would be the best thesis statement for the essay? a. years of using mouthwash nightly in lieu of brushing led to 15 cavities at my last dental check-up. b. regular dental check-ups not only keep your teeth attractive and healthy, they also serve as an opportunity to detect oral cancer. c. dental visits are important. d. getting a check-up from your dentist is a good first step towards having fresh breath.