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 use memes on facebook [title] Log into your facebook account. [step] Go to facebook, and if you're not logged in yet, enter your registered email address, or username, and password in the top right fields. Click " log in " to continue. <sep> (A) [title] See all the memes in the top left section. [step] The memes you want to edit are listed below. (B) [title] Use the appropriate heading to search for memes. [step] In the upper-right corner of the page, you'll see a drop-down menu. (C) [title] Click the update status box at the top of the page. [step] There's an update status box at the top of your facebook news feed and timeline. (D) [substeps] If you haven't signed in yet, you'll need to give the sign in process a shot. Click the " sign in " button in the upper-right corner of the screen.
Example Output: C

Example Input: A man shows a video of himself training for the weightlifting events in the olympics. several times <sep> (A) he practices weightlifting while someone films him and clips him outside. (B) he is shown doing lift lifts and then off of the bar. (C) , times when they are in the olympics, coaches speak with them while the camera pans around the competition. (D) , he picks up weight and lifts it over his head.
Example Output: D

Example 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.
Example Output:
C