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". 

Ex 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.

Ex Output:
B


Ex Input:
An athlete practices tossing a javelin in a track a field course. The athlete starts with two or three side steps and then proceeds to toss the javelin. the athlete <sep> (A) then increases his speed and steps. (B) runs parallel to the chalk and throws four instructions that lead into a discus throw, where he throws the javelin as far as he can into the distance. (C) then does a backswing outside of the track. (D) throws the javelin to the other side and then back to the field.

Ex Output:
A


Ex Input:
[header] How to tell between an erupting and impacted wisdom tooth [title] Know where to look in your mouth. [step] Your wisdom teeth are the last molars on each row of teeth-the uppers and lowers on both sides. They are meant for grinding food. <sep> (A) They are also for self-control in emotions, misunderstandings, and improvisation. [substeps] Look for the wisdom side of your mouth. (B) These teeth are tiny enough to be used for grinding an entire piece of food. However, they can cause severe jaw pain if swallowed, so it's best to check with your dentist if you're unsure about where to look. (C) The uppers sit on the roof of your mouth, so that the front teeth have a space to release food and saliva. [substeps] When you notice the top of your mouth growing upward, this can send a message. (D) You don't need them to chew properly, but they pop up (erupt) when your jaw grows and elongates during your late teen years. Open your mouth wide and use a penlight to see the back of your mouth.

Ex Output:

D