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 choose the best hula hoop (adult sized ) [title] Measure your height from the floor to your belly button. [step] This measurement will then help to determine the diameter of the hoop you should purchase. The hula hoop, when resting vertically on the ground, should reach somewhere between your waist and mid-chest. <sep> (A) [substeps] Example: if your height is 36 inches (76 "), then 118 inches (77 ") would be the minimum height. For kids, this would be 24 inches (76 "). (B) This is your base diameter measurement and can be adjusted slightly depending on your size and experience level. [substeps] For example, most adults will begin with a hula hoop between 40 and 44 inches in diameter. (C) [title] Find a hoop that you know you can balance on. [step] This will improve the stability of the hoop and prevent you from accidentally dropping the ball while on it. (D) Your waist should be about an eighth of an inch shorter than the hoop. You should also measure your waist from hips to ankles, and to knees with a ruler or measuring tape.
Example Output: B

Example Input: People are standing around a christmas tree. They put lights onto the christmas tree. they <sep> (A) decorate the tree as its decorated. (B) throw wrapping paper onto the tree. (C) begin to put decorations onto the christmas tree. (D) put march lights onto the tree as well.
Example Output: C

Example Input: A man walks up to the side of a pool. he <sep> (A) puts on his diving equipment. (B) goes inside the pool and starts doing tai chi. (C) then dives in, neck first. (D) dives into the water and floats to the surface.
Example Output:
D