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 Q]: [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 A]: D

[EX Q]: [header] How to make healthy mashed potatoes [title] Wash and cut the potatoes. [step] Wash 1 1/4 pounds (567 g) of your potatoes. You can also use a mix of potatoes and root vegetables for a variety of nutrients. <sep> (A) You can discard the peels, pits, and skins to make only healthy mashed potatoes. [substeps] The mashed potatoes will have a mildly sour texture after this step. (B) Leave the skin on the vegetables and cut them into 1-inch (2.5 cm) pieces. [substeps] Ensure that the pieces are the same size, so they cook evenly. (C) Wash the potatoes out of a colander and rinse them under clean running water. Then rinse each potato under cool, running water for about 5 seconds to remove dirt. (D) Wash the potatoes under hot tap water so they're soft and ready to eat. [substeps] Fresh or frozen mashed potatoes will last 7 to 10 months.
[EX A]: B

[EX Q]: [header] How to make a crown braid [title] Part your hair in the middle. [step] Separate your hair into two sections, the left and right side. Secure one side while you work with the other, so they don't get mixed up. <sep> (A) [title] Start with the middle section, then work your way down to the crown. [step] Leave one section about third of the way from your roots; work smoothly from one end. (B) Most people prefer to braid with the left side. This is the left strand closest to the head and works best if you have straight hair. (C) [title] Place your hair on a clean bed or mat to cover your crown-head. [step] Next, place the crown-head of your hair near the hairline, so your roots are in close touch. (D) You can do this by adding a scrunchy or a hair clip, so that the one side doesn't get in the way. Try your best at containing any loose hairs which might pop out.
[EX A]:
D