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

How to whiten nails 
Soak your nails in commercial denture cleaner. 
Denture cleaners can contain one of several different active ingredients, but each cleanser has some type of active ingredient that is capable of stripping away stains from hard, white surfaces. 
Dissolve a denture cleaner tablet in a dish of warm water according the the label instructions.

Choices:
1). Make sure that the tablet is completely dissolved so that you get the full benefit of the cleanser it contains. Soak your hands in the diluted denture cleaner for five minutes.;
2). Add as much or as little of the product as you can on each one of your nails. You can microwave the solution for a few minutes, or put it in your washing machine in a separate bowl.;
3). Leave this over your nails for about 30 minutes prior to washing them. If you experience a burning sensation after 5 minutes, water is too harsh for your nails.;
4). Soaking your nails in a fresh, clean solution can be very effective. Wipe your hands after you've soaked the solution in water and let them soak for one hour before proceeding to whiten your nails.;
1).