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 elevate your hand while sleeping [title] Sleep on your back or side. [step] In order to elevate your hand while you're sleeping, you'll need to sleep on your back or on the side opposite of the arm that needs elevation. This is the easiest resting position for elevating your hand. <sep> (A) [substeps] Lying on your side not only has been shown to help alleviate hand inflation, but it also improves circulation in and around the hand and wrist joints. It's also more efficient than sleeping on your side. (B) [substeps] You can use a pillow to support your arm when you start to feel like your hand's elevating off the ground. Place a rolled up towel over your head to help prevent air from pooling near your arm. (C) [substeps] Sleeping on your stomach won't allow you to elevate your hand as easily. It's much harder to prop it up from behind if you're lying flat on your stomach. (D) [substeps] Lie on your back with the pillow propping your head up at a 45 degree angle. Your dominant hand should support the bottom of your pillow.
Example Output: C

Example Input: A man named prvni kroky is on metal stilts outside and he begins, walking, jumping, running and moving and doing various movements while on his stilts and people around him are either sitting or walking doing their own thing. when the man <sep> (A) is done, the table is properly set. (B) stops jumping it has a black cage with a little trolley on the front, and he begins playing across the back with both items first removing the bars, turning the handle and then tightening the chain. (C) is done exercising and performing various moves and extensions for doing the extensions he begins to speak to the camera and such and a keyboard is shown up close. (D) is done demonstrating what he can do on the stilts he stops in his original spot to talk some more, waves and then runs off.
Example Output: D

Example Input: [header] How to play big bear's den (ukrainian snow game ) [title] Draw a large square on a flat area of snow. [step] Use a large stick or the end of a shovel. See note under " tips " for square size needs. <sep> (A) [title] Mark all four cubes at the points where they meet. [step] Place vertically one cube on each of the matching squares. (B) [title] Draw another square inside the large square. [step] The inner square is the big bear's den. (C) [title] Next, draw a long, thin notch. [step] Don't make it to the tip; you will have to guide them at the bottom of the square so as to leave room for an entrance. (D) It can serve as a circle, while large square may be included as well. [title] Draw a large circle and two circles for each animal and make a line between them.
Example Output:
B