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 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.

Ex Output:
C


Ex Input:
[header] How to install a bakflip hd tonneau cover on a ford f150 [title] Place the rail of the bakflip hd on right hand side bed rail of the f150. [step] Slide the tonneau rail all the way forward to the bulk head. It is a good idea to have a squeeze clamp or similar to hold it in place. <sep> (A) [title] Slowly turn the bakflip over so it moves slowly, its going to wobble and have to be bent the opposite way of the rail. [step] Be prepared for a lot of bumping. (B) [title] Tightly wrap round tray socket on right hand rail over cover and fasten. [step] Compression disks complete a swivel mounted over rail. (C) [title] Place the included rail clamps in place. [step] Tighten with a wrench or socket. (D) This will prevent the oil from jumping up and down accidentally while the g2 is being painted. [title] Place the nikon bolt assembly inside the couplers cradle.

Ex Output:
C


Ex Input:
[header] How to discipline toddlers [title] Know when to redirect. [step] Toddlers move very quickly from one feeling to the next, so if one can distract them long enough for them to forget what they're upset about, you'll be set. This is called redirection. <sep> (A) Your toddler will go into their last feeling as if the situation is an accident and they cannot stop the flow of their sadness. When they pause, they do what they want to do. (B) When your toddler stops and is frustrated, redirect him so he doesn't make a move to interrupt you. [substeps] Use this tactic too on some trips and relocations: say " hey george, i need to get a little more help. (C) Of course, the goal is not to distract them so that they never learn, but rather to help them move on from one thing to the next without getting caught in an emotional loop. However, there are some situations where redirecting is less productive. (D) If you harass them continuously, they'll start resenting you for where you are and won't be able to enjoy the distraction. [substeps] For instance, if you know that their bedroom is an eyesore, avoid punishing them there.

Ex Output:

C