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

How to keep a toilet bowl clean
Use a multi-surface chemical cleaner.
For best results, choose a cleaner that promises to both disinfect and cut through difficult stains on ceramic surfaces, such as mildew and hard water deposits. Spray or sprinkle the toilet bowl cleaner liberally around the interior of the bowl.

Available options:
(a). Focus on areas with especially heavy staining or mold buildup. You also have the option of treating your toilet with a homemade cleaner made from a combination of ingredients like vinegar, baking soda, borax or hydrogen peroxide.;
(b). After you finish, rinse and dry the interior of the bowl and clean it the rest of the way with the exact same chemical cleaner. Most commercial cleaners are made with borax, but you may want to try another.;
(c). As the cleaner soaks into the liquid, begin to wipe the surface clean. Note that the cleaner may start to smell.;
(d). Some cleaners will even wipe off dust bunnies. Wear rubber or vinyl gloves when handling the bowl.;
(a).