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

How to prepare metal cleaner
Scrub the aluminum with your ph-balanced cleanser to remove food, dust, dirt and grime.
Most aluminum is actually aluminum alloy because aluminum itself is very soft. Keep this in mind when cleaning and avoid harsh chemicals and abrasive sponges, since you don't know which alloy is used.

Options are:
* It is important to clean your metal when you use it because the cleaning agent will create rust. If you have a stainless steel bathtub, you can clean the bottom of the bathtub right after you dry it with a soft rag or paper towel.
* Mix a solution of water and 2 tbsp. ( 29 ml) of vinegar, lemon juice or cream of tartar for small pieces of aluminum or aluminum cookware.
* Use 2 tablespoons (30 ml) of table salt. Salt is the number one ingredient in sodium-based cleaners, so clean it first with salt before cleaning.
* Clean aluminum with a soft bristle brush or plastic scouring pad. Since stainless steel is very soft, it will be easier to clean it if you scrub it with the brush.
Mix a solution of water and 2 tbsp. ( 29 ml) of vinegar, lemon juice or cream of tartar for small pieces of aluminum or aluminum cookware.