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: We see a man teaching others to sharpen a knife in a butcher shop. The man wets the sharpening stone. Two men in the back laugh at something. the instructor <sep> (A) shows us a basket of pennies. (B) checks the knives and uses the sharpened knife to sharpen a one. (C) uses a sharpening rod for the knife. (D) puts a paper in the sink.
Example Output: C

Example Input: [header] How to make a todo list on your iphone [title] Invoke siri. [step] Press and hold your iphone's home button until you hear two beeps indicating that you can ask siri a question. [title] Tell siri what to remind you about. <sep> (A) [step] At the phone's screen, you will be asked if there is anything you want to add to the list. Refer to siri before proceeding to any foods or herbs on the list to make sure " extras " are included. (B) [step] Siri will tell you to remind you what time to wake up so that you can think of what to make on your todo list. [substeps] To make todo lists, tap the sleep/wake button, then toggle " home " to " sleep. (C) [step] Siri should ask you the following questions. [substeps] What are your venturabos? Are there any themes you want reminded? What do you want to be remembered? [title] End your list. (D) [step] Speak into your microphone (at the bottom of your phone) naturally as you would with another person, and with clear articulation. Say " remind me to buy milk at 6 pm.
Example Output: D

Example Input: [header] How to teach your dog to heel [title] Find a quiet place to train your dog. [step] You want to eliminate distractions, so that your dog can concentrate on you easily. If you have a backyard, that is the perfect place to train your dog. <sep> (A) Otherwise, find a quiet corner of a park with few other people or pets. If outdoors is too distracting, start inside. (B) However, if you have a big backyard, that may not be a good idea. You want to build up flexibility, so make sure your fenced in area or your backyard is not far from your dog's park or home. (C) However, you should never put your dog in a fenced-in yard. Additionally, you cannot put your dog in a shelter for two reasons. (D) Choose a place where your dog can stand and extend the leash lightly, pulling it close to your side of the yard. Now it is time to get this training started.
Example Output:
A