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 put music on facebook [title] Navigate to the website that features the music you want shared. [step] Examples of such websites are youtube and soundcloud. [title] Click on the " share " button located next to the music selection you want shared. <sep> (A) [step] You will be redirected to a page explaining to you exactly what music you want shared, and the category where it can be shared. [title] Click on " share " located below " share " in the drop-down menu. (B) [step] If you have multiple fans or listeners, you may see a link in the sidebar that says, " add a facebook friend to your friends list ". Click it if you want to add a facebook friend in the list. (C) [title] Scroll down until you see the right size. [step] If you are looking for music that is already on facebook, such as songs from a specific artist and/or a series of popular music videos, you will see the appropriate size. (D) [title] Select the option for facebook when asked how you want to share your selection. [title] Enter your facebook login information at the prompt.
Example Output: D

Example Input: [header] How to change trackpad settings on macbook pro [title] Find the system preferences. [step] Starting from your main desktop screen there are two ways to find the system preferences where the mouse and touchpad settings will be located : [title] Bring your cursor to the bottom screen and find the system preferences application. [step] The icon looks like a box with three gears inside it. <sep> (A) Open that to find all your system preferences. [substeps] Alternatively, you can use the spotlight feature. (B) On macbook pro this icon resembles a round blue square with a horizontal green dot on it. On other applications this icon is actually a box with a gear, and is small in appearance. (C) It can be located on the taskbar or in the upper left-hand corner of the window. [title] Let the system preferences application perform its work. (D) [title] Click the customize key in the dialog box. [title] Follow the on-screen instructions to change the customization function.
Example Output: A

Example Input: A man in a blue shirt bends down and picks up a large weight. He lifts it above his head and drops it onto the floor. he <sep> (A) drops the weight on his head once more. (B) lets go of the weight and leans forward. (C) lowers it back down and picks up another weight. (D) pumps his arms in the air in celebration.
Example Output:
D

