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 remove hair from your throat [title] Try to swallow the hair. [step] If you suspect that you have one or two hairs stuck in your throat, try to just swallow them. The hair will travel through your digestive tract like food does and your body will excrete them. <sep> (A) Pass the hair around your mouth under your tongue until you see no more hairs. It's important that you close your mouth as tightly as possible so that the hairs don't come back. (B) Sucking in the hair will leave your throat full of the hair. If the hairs are stuck in your throat, then you might want to rub a cotton ball or toilet paper over your throat to help get rid of the hairs. (C) This will open up the glycerine lining in your throat and prevent anything from coming out. [substeps] Wait a few minutes to see if they're gone. (D) Your body will not break down the hair because it's made of keratin, a dense protein. [substeps] If it feels like the hair is long, see if you can use your clean fingers to pull the hair out of your throat.
Example Output: D

Example Input: [header] How to make a great first vlog [title] Make sure that you have the right equipment. [step] You don't need an expensive dslr camera and microphone, but you should have a camera that can handle video in 720p at the very least. You should also have an external microphone that hooks up to the camera. <sep> (A) Your vlog will only work if you have a mp3 player. [title] Get good quality editing software for your camera. (B) [substeps] For digital vlogs, you will need one with both video and audio capabilities, such as a vlog. [title] Change the camera speed when you make it first vlog. (C) [substeps] If you have a smartphone (or even a tablet), you don't need to buy any equipment to complement it. Sound is just as important as video, so don't neglect your microphone if you buy a dedicated one. (D) [title] Set up your vlog in a well-lit area. [step] If you plan to be shooting at night, you might as well go indoors, or it might be too stuffy and possibly might be too warm.
Example Output: C

Example Input: [header] How to become a notary in texas [title] Be 18 years of age or older. [step] You can only become a notary public in texas if you are at least eighteen years of age. Proof of your age is provided by your birth certificate. <sep> (A) You will have to provide proof of both your signature and the form you've already filled out. [substeps] If you are older than 18 years, you will be issued a notary's identification card-a new (but valid) identification card issued by the state. (B) [substeps] Get a copy of your birth certificate. If you don't already have one, you might have to write, call, or (e) mail a form and fee to the office of vital records in the city, town or county where you were born. (C) A notary can be found at the bank where you have purchased the money and at a four-dot store in the county where the money is located. If you do not wish to be a notary after obtaining the money, you can, if necessary, obtain a notarized affidavit from the bank and stamp it with the date you purchased the money. (D) Your authentic birth certificate is important if you are to become a notary public, because it will show that you pass the exams the notaries perform and that you live in texas. [title] Complete the required coursework to become a notary public.
Example Output:
B