instruction:
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". 
question:
[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.
answer:
D


question:
A view is seen of the outside of an airport, then the wing of the flying plane. A man is on the plane wearing a mask. several people <sep> (A) are sleeping in the dark quarters. (B) fly by on a road inside the plane. (C) are shown flying the aircraft, while shooting at a large target at one point. (D) speak, then they all fly kites on the plane while people walk by.
answer:
A


question:
[header] How to sell a mattress [title] Look up local laws regarding the sale of used mattresses. [step] Laws regarding the sale of used mattresses and bedding vary by state or municipality. In many areas, used mattresses must be sterilized using approved methods and appropriately labeled before they can be resold. <sep> (A) [substeps] Your county courthouse may have a list of government agencies that deal with similar merchandise sold to you. In addition to public law violations, federal and state laws and regulations prohibit secondhand goods (including mattresses, furniture, and bedding) from being sold commercially, including mattresses. (B) While these laws mostly apply to third-party sellers, such as furniture stores and consignment shops, it is important to familiarize yourself with the law in your area before you attempt to sell a mattress. Do an online search, using terms like " legal to sell used mattress in [my state]. (C) Additionally, dpvs often use the name of the location to search for mattresses in extremely large containers and when they need to be sorted through the resulting paperwork. In the united states, every state has its own law regarding whether their stolen mattresses must be examined separately from their used mattresses. (D) Stores such as department stores, private bank businesses, and classified ads can sometimes offer a generic mattress mattress price that you will feel comfortable saving. [substeps] Prices to have on a mattress are usually less than $100 per loaf.
answer:

B