Detailed Instructions: In this task, you are given a context and four options. Each option is a suggested ending for the context. You should read the context and pick the best ending for the context. Please answer with "A", "B", "C", and "D". 
Q: [header] How to deal with dental devices [title] Take care of your teeth. [step] It's easy for food to get caught in between your braces, which causes plaque build up and overall poor dental health. Be sure to establish a good dental hygiene routine that includes brushing, flossing, and rinsing with mouthwash every day. <sep> (A) Brush your teeth about once a day and floss once a day. [substeps] Keep your teeth clean by brushing them as well. (B) [substeps] Brush at least twice a day, in the morning and before bed. It's best to brush after eating as well to avoid letting food sit in the braces. (C) [substeps] Brush your teeth twice a day and floss at least twice a day, if not more often. Gargle mouthwash before meals to rid you of plaque. (D) [substeps] Brush and rinse your teeth after every meal, or whenever you snack. Go to the bathroom in the morning or after every meal, if you have to.
A:
B