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". 

Ex Input:
[header] How to treat cold sores in your nose [title] Figure out if you have cold sores in your nose. [step] Because it is difficult to see inside of your nose, you may need to figure out if you have cold sore instead of another condition such as an ingrown hair or pimple. Checking the areas in and around your nose can help you figure out if you have cold sores in your nose. <sep> (A) [substeps] Check your nose from the bottom of your nose, just in front of your cheekbone, towards your chin. If it feels numb, there is probably something there. (B) [title] Determine if you have a stuffy nose. [step] In your nose, you may need to take some pressure off of the bridge of your nose and see if that pressure is gone or causes the discomfort. (C) [substeps] Use a mirror to check the visible surfaces of your nasal cavity. You may not be able to see much, but even detecting a cold sore can help. (D) [substeps] To figure out if you have cold sores, you may be looking in your nose. Either look back at the corner of your nose, or look to the floor.

Ex Output:
C


Ex Input:
[header] How to use docusign on pc or mac [title] Open the docusign email. [step] Use this method if someone sent you an email containing a docusign document that must be signed. [title] Click review document. <sep> (A) [step] This will take you to the archived documents section. [title] Click the document you wish to delete. (B) [step] When the email is finally redirected to your email inbox, you'll see a checkmark beside the discussion item (e.g.: " news sources "). [title] Click the checkmark next to your reference item item at the top of the current page. (C) [step] Your document will have been reviewed by the ftc. Ask for experience diagnosing ftml errors. (D) [step] It's the yellow button in the email. [substeps] If the sender requires you to verify your identity, follow the prompts to do so.

Ex Output:
D


Ex Input:
[header] How to stop a horse rearing [title] Figure out the reasons for rearing. [step] A horse will rear for numerous reasons, but for the most part this can be linked to fear. A horse will rarely show its underbelly, the main situation they would do this in the wild is when stallions fight for a mate. <sep> (A) He may use his tail to shoo another horse to become the dominant one. This often occurs when the horse is ready or he needs to be ridden out, for example, for the exercise he needs to eliminate obstacles. (B) [title] Do not (poorly understand) halter your horse. [step] Use an upright bridle or halter. (C) In general kicking out and bucking is more common, and when young horses are backed, this is the natural reaction. If a horse is rearing there may be a serious reason, maybe it was taught to by previous mishandling or poor riding, for example. (D) Equestrian horses are often angry when their hooves strike the ground. In a much more mature show horse, this can be a cause for concern.

Ex Output:

C