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:
[header] How to love reading [title] Consider why you want to read. [step] People read for a wide variety of reasons. Before you pick up a book, consider what you want to get out of reading. <sep> (A) Some people like reading books that teach them new skills, from computer programming languages to skills for hunting or camping. Other people enjoy narratives, whether fictional or biographical, to transport them to other times, worlds, or situations. (B) Maybe you want to learn how to read to overcome your depression, or maybe you want to learn how to fix the problem you have with your previous reading. Identify, by reading, why your brain is going through a few different positions and see which position you are thinking about reading in. (C) Are you concerned about losing weight? Good books can have a much greater impact on your emotions, yet the answers to most of your questions are still unknown. [substeps] Do you want a great book in mind? Like many writers, you may have been hoping a novel could express a feeling of still love while taking care of your children. (D) [substeps] You can visit your local library, read at a coffee shop, or do some more reading. You can also read online if your websites want you to read.

Ex Output:
A


Ex Input:
[header] How to treat a fungal infection of the sinus cavity [title] Track the progress of the fungus. [step] Aspergillus fungi will first infect the paranasal sinuses and airways. It may then progress down into the lung tissue, or remain in the sinuses. <sep> (A) If the infection continues into the lining of the mouth, it might result in nose bleeds and difficulty swallowing. [title] Examine the nasal cavity to get a sense of where the infection should originate. (B) It can also drip down the lung tissues. [title] Get your sample taken at a laboratory. (C) If you first suspect an infection, you should see your doctor. Other telltale signs of fungal infection in a sinus cavity are : [substeps] A decreased lung capacity that restricts oxygen flow to the throat. (D) At this time, the fungi will form a fungus ball, or aspergilloma, which is the hallmark of this infection. [substeps] A fungus ball is a mass of fungi that form together.

Ex Output:

D