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".
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Question: [header] How to exercise to prevent blood clots [title] Get up and move around. [step] Whether you're traveling by train, plane, or automobile, long-distance travel involves a lot of sitting. When you sit, you decrease circulation in your legs-especially if you sit with your legs crossed or with one foot under you. <sep> (A) If you are on a train or coach, the seat underneath you always feels flat, as if you are sitting. While there are good ways to stretch out your legs, there is not a lot a group of people can do. (B) This will help promote blood circulation to your feet. It will also keep you from rubbing your legs in an annoying manner-you can't promote blood flow when you're sitting on one leg. (C) [substeps] You can exercise while you drive or driving, although getting up and down on the exercise train can significantly improve circulation. You can also listen to music while you exercise, which will also help to prevent blood clots. (D) [substeps] If you're on a plane, try to get an aisle seat so you can get up and move around more easily. Ideally, you want to get up and stretch your legs or walk up and down the aisle once every hour or so.

Answer: D

Question: A small group of children are seen standing before a mat with an instructor helping. the girls <sep> (A) then begin throwing a rope to the back and covering the boys head with the rope. (B) then pole vault on the mat and swing during a routine. (C) do various gymnastics moves across the mats while an instructor assist them and another points to the side. (D) take turns running to the mat and pushing it down.

Answer: C

Question: [header] How to figure skate (for beginners ) [title] Gear up. [step] Before you get out on the ice, you need to put on your skates. Don't worry about buying your own gear right away. <sep> (A) You need to buy the right skates. Or else you run the risk of ruining your skates. (B) You'll be carrying it out at your skating rink, so it's a good idea to save it for later. Whether on you skates or out on the ice, it's important to make sure you're warm and comfortable. (C) There are some tips to keep in mind when assembling your skates : [substeps] Beginners need to make sure that your skates are in good condition before attempting to take them out. If your skates are worn out, you may not be able to skate well in them. (D) You can rent your gear until you're sure you want to figure skate for a long time. Remember to dress warmly! Gloves and scarves are good.

Answer:
D