A writer 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.