Definition: In this task, you are given a context and four options. Each option is a suggested ending for the context. You should read the context and pick the best ending for the context. Please answer with "A", "B", "C", and "D".
Input: [header] How to restore black plastic [title] Wash and dry the plastic's surface. [step] The olive oil will absorb best into a clean surface. If your plastic object is dirty, wash it with soap and warm water. <sep> (A) Avoid cutting the caulk from areas that absorb too much oil or too little water. Rinse all parts of the object with cool, soapy water when you're done. (B) Dry the affected piece of plastic on top of a clean surface and then gently sand it with a coarse sandpaper. This will remove any rough edges that might affect performance as you clean it later. (C) Dry it off with a towel before restoring it to prevent the olive oil from slipping off. [title] Pour a coin-sized amount of olive oil on a cloth. (D) If your plastic object has a stain or become discolored, dry it off first with a damp cloth. [title] Place olive oil into a small bowl.
Output:
C