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 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.

Ex Output:
D


Ex Input:
[header] How to recognize signs of senile dementia [title] Check for memory loss. [step] Everyone forgets things from time to time. However, dementia sufferers may have difficulty remembering recent events or familiar routes and names. <sep> (A) Symptoms commonly associated with dementia include : [substeps] Memory loss: selective memory of information. More detailed information could be remembered later, but difficulty recall is more likely. (B) [substeps] Everyone's memory is different, and occasional forgetfulness is common among the general population. Family members and close friends typically will be the best judges of changes in behavior from what he or she was like previously. (C) Some people who have dementia make bizarre or strange memories. For example, they may remember that you are going to their house only after they have returned from their vacation. (D) One common symptom of senile dementia is a loss of memory. A person who stutters on words or can't think well may also suffer from memory impairment.

Ex Output:
B


Ex Input:
[header] How to get another phone's call log [title] Determine which carrier your target phone uses. [step] You'll need this information in order to log onto the proper service provider page. Most phones display their carrier's name in the top left corner of the screen. <sep> (A) [title] Navigate to the carrier's website. [step] If the phone you're attempting to track is on a verizon network, for example, you'll need to go to the verizon website. (B) It will usually read " my carrier " or something similar. [substeps] Some mobile phones use an option called options, and this options is mostly for use only. (C) It is a square and has six numbers and the last number is for at least one carrier. [title] Check the type of carrier you are using. (D) You'll see this appear right below the line you're currently on. [substeps] There are a few carriers that only use bluetooth.

Ex Output:

A