Multi-choice problem: Continue writing the next sentence in this paragraph:

How to choose foods for healthy teeth
Get in regular servings of calcium-rich foods.
Even though teeth are not considered bones, they are still made up primarily of calcium deposits. Calcium is essential to the maintenance of healthy teeth and gums.

Select from:
1). Calcium not only plays a role in the maintenance of healthy teeth, but also in the maintenance of the jaw bones which hold the teeth in place preventing loose teeth, fractures or even periodontitis. Calcium is most commonly found in dairy foods-like cheese or milk.;
2). Calcium is the source of important vitamins, minerals, and antioxidants that help your teeth to grow properly. Depending on how long you have been with your teeth, you should ensure that you eat enough calcium-rich foods.;
3). Give yourself plenty of calcium (10-24 mg per day) when you eat solid foods such as seafood, dairy, nuts, seeds, beans, or fruit. Avoid foods with added sugar, such as margarine, refined grains, and foods high in sugar, since they promote the growth of bacteria.;
4). Most adults need 25 to 45 mg of calcium daily. You can get the recommended intake of calcium if you're an elderly man, and for those with rpd the amount depends on your height, weight, and activity level.;
1).