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".

Q: [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.

A: D
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Q: [header] How to act during a fire drill [title] Stay calm. [step] Do not panic when you hear the fire alarm. Also, it's important to stay quiet so you can hear any instructions. <sep> (A) Also, do not get caught panicking. Staying calm will help you calm down as the fire clock ticks and alarms go off at regular intervals. (B) [title] Do not attempt to push the drill to divert the fire. [step] Do not attempt to push the drill at people or leave the master fuse unattended. (C) Turning to your cell phone or microphone can be deadly! [title] Stay warm. [step] Do not wait until the fire is out to stay warm! Your body temperature can drop, but it's better to stay near a heat source. (D) [substeps] In fact, it's important to be quiet and calm the whole time the fire drill is happening, not just when it starts. [title] Treat the alert as if it were a real fire.

A: D
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Q: [header] How to cope with hunger [title] Keep yourself hydrated. [step] Pouring yourself a big glass of water and drinking it may help to quell any cravings or hunger. To stay hydrated, women should consume 2.7 liters and men should consume 3.7 liters of fluids daily. <sep> (A) [substeps] If you don't want to drink plain water, you could add a slice of lemon or a sprig of mint. You can also add flavorings to your water to make it more appealing. (B) Try sipping green tea, sparkling water, iced tea, or flavored water. Read your water's descriptions and explain why you like the flavor. (C) [title] Count calories when you are sick. [step] To help both mental and physical health, take at least 20 minutes each day to count your daily calorie intake. (D) [substeps] Drinking at least eight to 13 glasses of water daily will help to keep you well hydrated. [title] Research how your body works and self-regulate how you feel.

A:
A
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