Write the next sentence in the following story.

How to protect your teeth from disease
Take care of your teeth and gums.
This is the first requirement. One cannot always rely upon the dentist so he must take necessary steps at home to prevent any dental problems.

pick from the following.
[A]. Healthy and strong teeth add charm and beauty to one's smile, so it is important to keep them healthy and protect them from any diseases. Tooth decay is the major problem caused due to cavities.
[B]. Dental cleansers are formulated to clean teeth or gums without whitening them. Wear the appropriate 3 inch (7.6 cm) toothbrush on out of habit.
[C]. Here are some places to check out : Brush your teeth before and after eating, and between meals to avoid tartar buildup on the back of your teeth. Brush your tongue and gums every day.
[D]. Sign up for braces and brush regularly. See your dentist monthly to ensure that your gums are healthy.. The answer should be
[A].