Detailed Instructions: 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".
Q: [header] How to reuse an old bottle of nail polish [title] Add a few drops of nail polish thinner to the bottle. [step] Put the lid back on firmly. [title] Give the bottle a good shake. <sep> (A) [step] The nail polish thinner will help to release any congealed nail polish, making it usable again. [title] Use as usual, until it's all gone. (B) [step] The residue will likely remain in the spray bottle while you reuse it. Don't shake it so well that it sprays directly into your eyes or your nose. (C) [step] Run the bottle through several minutes of light shaking. It is not necessary to pump the nail polish thinner at this point. (D) [step] You'll hear bubbling as the nail polish is getting dissolved. This indicates the container has begun the process of reusing.
A:
A