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 start a local petition [title] Understand the issues in your community. [step] For a local petition drive, you will need to begin by understanding the important issues in your community. Read your local newspapers. <sep> (A) See if your town has government aid programs dedicated to conforming to local laws or new legislation. [substeps] Find support from local political and cultural organizations by asking other supportive people in your community for help. (B) Attend sessions of your city council or other local legislative body. Find out what people are saying or thinking about your issue. (C) Ask the kids at your school or daycare if they have noticed anyone else doing so. Try to check the elections board for any upcoming election. (D) Check websites like facebook and twitter for a local petition. [substeps] You can also organize the petition by taking several letters from your local newspaper.
[EX A]: B

[EX 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.
[EX A]: D

[EX Q]: [header] How to charge a kindle [title] Plug your computer or laptop into an outlet. [step] It should be connected to power to ensure it will have enough battery to charge the kindle. [title] Turn your computer on. <sep> (A) [step] Make sure your computer is set to boot up. [title] Perform a search for " amazon.com this kindle is something special. (B) [step] You will need to leave the computer on and avoid stand-by or hibernation mode during the charging process. [title] Find the micro usb cable that came with your kindle. (C) [step] Tell your parents or teammate you want to charge your kindle. If you share a pc, both computers should have their respective terminals plugged into a outlet. (D) [step] Look for a chroma-emitting device, such as an iphone or ipad. [title] Check to see if your device is compatible with bluetooth or wi-fi.
[EX A]:
B