This is a test of commonsense with single/multi-choices. Complete the next sentence:

How to pick your teeth without a toothpick
Use some floss.
The absolutely ideal thing to use to tackle anything stuck between your teeth is some dental floss. If you have some handy, or keep some in your desk drawer at work, this is your best choice.

A). This is the safest and most effective way to clean out food from between your teeth. Break off a length of floss that is about a foot long..
B). Just make sure it's strong enough to get through your teeth; a small piece won't count for much except as a ribbon. Usually, dental floss is considered the most hygienic choice for a tooth..
C). Floss as long as you can and then rinse the floss between your teeth. This is one of the best ways to practice good dental hygiene..
D). You could also get one of these at your local pharmacy or cosmetic store. Use a little bit of benzoyl peroxide..
The answer is:
A).