You will be given a definition of a task first, then some input of the task.
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 know what essential kid gear is if you're a girl [title] Maintain your swiss army knife. [step] This is a key tool for survival, exploring, and camping. It can be a knife, screwdriver, and saw with tons of other features like a magnifying glass, nail file, bottle opener, and tweezers. <sep> (A) Sharpening it with it can be a very useful tool to use in the wilderness. [title] Begin your hike with only an adequate backpack. (B) Best of all it fits in your pocket, backpack, or anywhere you can store things on the go. Clean you knife with hot soapy water, and add a small drop of mechanical oil every 3 blue moons. (C) Your swiss army knife comes in many shapes and sizes, but it's best to use one made for traveling. [substeps] You can find online re-sharpened swiss army knives for someone who is on a budget. (D) Don't forget to use the right tools for it to be safe. [substeps] Your swiss army knife is an old one that most likely will fetch around two hundred dollars in liability insurance.
Output:
B