Multi-select problem: How does the next paragraph end?

How to remove yellow between the teeth
Floss.
You might accumulate yellow matter between your teeth if you are not flossing regularly. Flossing can instantly remove a lot of the build-up between your teeth that causes discoloration.

Choices: 1. Not all dental dentists recommend using floss for these issues, however. To floss between your teeth, simply step on the floss and gently hold it between your teeth.. 2. Make sure to make flossing part of your daily routine. Use a good amount of floss-it should be about 18 inches in length.. 3. The american dental association recommends that adults floss once every day. Go to the dentist's office and floss.. 4. To floss, begin at the base of your gumbone just to the top of your teeth. Make sure that your gums come into a comfortable position..
2.