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". 

Example Input: [header] How to protect your intellectual property [title] Know the three types of intellectual property. [step] There are three different types of intellectual property that you and your business may have created. Each can be protected under the law, but there are different categories for each one. <sep> (A) A shortcut to remember the differences between the three is that a patent protects the invention, the copyright protects the artistic expression of the invention, and the trademark protects the brand name. [substeps] If you have invented an item or system that is new, useful, original, or ornamental, then you may be able to patent it. (B) [substeps] Trade secrets are the only kinds of intellectual property that you and your team can sell. Goodwill is the only type of intellectual property which you can earn without investment. (C) Realize the following basic categories : [substeps] Intellectual property. This is non-exempt from federal and state laws. (D) To protect intellectual property, you must be licensed, insured, and have information about how this performance impacts you and those involved. [substeps] Private intellectual property is allowed only if there are only two parties involved, or if the business isn't trademarked.
Example Output: A

Example Input: [header] How to fist bump [title] Ball your hand up into a fist. [step] Press the tips of your fingers into your palm so that your hand makes a fist. This will be the position that you keep your hand in for the bump. <sep> (A) Hold the fist up high enough to extend your palm to one side. Bend your wrist so that both fingers are pointing out, with the whites of your knuckles showing. (B) [title] Put your fist out in front of you. [step] Place your fist in front of your body with your knuckles facing up. (C) Make sure your palm looks nice and flat. Ideally, this hand should be neither thicker nor thinner than your fist. (D) [substeps] Whether you're with friends or with an opponent, the fist looks like a punching bag in a gym. The knuckles, the tips, and thumb look like a regular ring finger.
Example Output: B

Example Input: [header] How to make pvc demo weapons [title] Cut the pvc pipe to the desired length. [step] The length and width will vary by the martial art you are demonstrating. For example, monkey kung fu uses a 3-4 foot (0.9-1.2 m) staff. <sep> (A) For experienced martial practitioners, the lengths of your staffs should be ½ to ½ inches (1.3 to 0.8 cm). [title] Cut the pipe for the end of the apparatus. (B) Some people find a staff person' too long' for the length and width ratio. If you have at least 15 or more inches to spare you may just want to start off with a longer staff. (C) Be careful not to cut the pipe in two, or it might change the material. [title] Add wood, sand, steel, finely grained asphalt or other non-galvanized stuff to your base. (D) [title] Glue the pvc end-caps on with on pvc cement. [step] This will make sure everything stays put.
Example Output:
D