Detailed Instructions: 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".
Problem:[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.
Solution:
B