Given the task definition and input, reply with output. 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".

[header] How to use a vegetable steamer [title] Take proper precautions. [step] Before using an electric steamer, it's important that you read the instructions that came with your steamer. Taking proper safety precautions can help prevent injuries and fires/burns. <sep> (A) [substeps] Never submerge the cord, plug, or base unit in water. Only use electric steamers indoors and on a stable surface, like a kitchen counter. (B) Know that you should never let uncooked vegetables fall into boiling water (the leaves or stems of vegetables are rarely cooked). [title] Place medium sized vegetables in the steamer and cook for 1 minute. (C) [title] Plug in the steamer if you are going to use an open steamer. [step] When you're going to use an open steamer for frying or steaming vegetables, ensure that your steamer is plugged in (unless you're in the same room where the vegetables are. (D) Make sure to consult care labels before using an electric steamer. Caution: do not steam it for a long period, and do not heat it the rating called for in the instructions.
A