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 post to a facebook group on pc or mac [title] Go to https: // www.facebook.com in a web browser. [step] You can use any web browser, such as chrome or safari, to access facebook. If you're not already signed in, sign in now. <sep> (A) [title] Click on the downward-facing arrow in the top right corner of the screen. [step] It's at the top-right corner of the screen. (B) [title] Click your profile picture at the top-right corner of the page. [step] You will see your profile picture in the upper-right corner of the page. (C) [title] Click a group to open the group's menu. [step] Click the group on the right sidebar, or the group's upper menu of options. (D) [substeps] You must already be a member of a group to post to it on your computer. See join groups on facebook to learn how to join a group.
Example Output: D

Example Input: [header] How to become a loner [title] Find productive ways to spend time alone. [step] Loners often spend time alone to recharge after spending a lot of time socializing. You can do whatever you want when you're alone, which is one of the great things about being a loner. <sep> (A) Join a club or craft project that excites you. [title] Visit a library, movie theater, or a school newspaper. (B) However, since you'll be spending a great deal of time alone, learn to use that time wisely. [substeps] Learn a new skill, or use your alone time to focus on your hobbies. (C) [substeps] Your solitary time is important because it helps you feel more involved in doing a variety of things. For example, you could pretend you're an explorer or go hiking. (D) [substeps] If possible, try your hardest to take a break every hour of the day to " recharge. " this is also one of the best ways to distract yourself from your thoughts and worries.
Example Output: B

Example Input: [header] How to contact twitter [title] Direct message @twittersupport for quick assistance. [step] Log in to your twitter account online or through the twitter app. Create your message and then send it to @twittersupport. <sep> (A) Someone in support services should respond directly to your message. Keep in mind that they may direct you to fill out a form through their help center. (B) Do not expect to see more than a few generic replies. Tap a follow button at the bottom of the screen. (C) Twitter and facebook automatically start their automated responses. [substeps] To get started, tap the snap tool icon on your apps screen. (D) Follow the instructions at the top of the email. [title] Open the twitter program you want to use to send a tweet to twitter.
Example Output:
A