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

How to remove rust from metal
Use white vinegar.
The vinegar reacts with the rust to dissolve it off of the metal. To use, soak the metal in white vinegar for a few hours and then scrub the rusty paste off.

Options are: (A). If there is rust left on the metal, put some white vinegar into a little bit of water and soak it for 15 minutes. Then rinse the metal down with some water and wipe it down with a soft cloth.; (B). If you aren't able to find white vinegar at your local hardware store, you can also use olive oil instead. The oil will help to remove the rust.; (C). Repeat this treatment every four to five days until rust is removed from the metal. White vinegar is available at most hardware and auto parts stores.; (D). If the object is too big to soak directly in the white vinegar, pour a layer over the top and allow it time to set. You can also wipe it down with a rag soaked in vinegar.;
(D).