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 start a campfire [title] Make sure that you can legally build a campfire. [step] If the season or region is particularly dry, there might be restrictions on when, where, and why people can light fires. Check the local fire restrictions online or at a ranger station before you go. <sep> (A) Some areas require you to register a campfire permit. You may only be able to build fires in designed " campfire " spots. (B) [title] Use non-flammable fires. [step] Water is a great way to start a campfire, especially if you're using one that's flammable. (C) The different kinds of campfires these days offer are : [substeps] Burned out campfires: small campfires that get too hot before they light. Inside campfire tents: the ground should be cool before cooking. (D) You might need to demonstrate to them the nature of your fire. [title] Choose to build your campfire indoors.
A:
A