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 improve your leg flexibility [title] Start off with the " easy pose. [step] " sit on one or two folded blankets with your legs stretched in front of you. Bring your legs in and sit cross-legged, and make sure your knees aren't at a level any higher than your hips (sitting on the blankets will help with this). <sep> (A) Lift your feet (they should be positioned vertically in front of you with your feet shoulder width apart) off the blankets. [substeps] Get slightly more rigid by taking big strides forward and focus on the floor around you. (B) Do the pose for 4 to 6 sets of 10 repetitions. [substeps] You can use your foot in this pose if you want to strengthen your leg muscles. (C) [substeps] Many people find it hard to do a basic pose with their legs crossed before they can complete yoga poses like the " leg dog " pose. This exercise can be coupled with the' loom pose' to improve your leg flexibility. (D) Don't let your chest sink down: hold your chest out and pull your shoulders back. [substeps] Hold this pose for several minutes, and feel the stretch working through your quads, hips, and lower back.

A: D
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Q: [header] How to avoid the stomach flu [title] Wash your hands often. [step] Wash your hands carefully with soap and water for at least 20 seconds. Always wash your hands after going to the washroom and before and after handling food and eating. <sep> (A) Washing your hands is important, since if the way you handle and eat is bad (germs, bacteria, etc. ), your best chance at preventing the flu is by keeping your hands clean. (B) Don't attempt to dry or clean your hands on something other than a business table. [title] Wear long pants (not utility pants to wear running shoes with). (C) [substeps] It's a good idea to wash your hands between-and as many times as you go to the bathroom. This will help prevent an episode of nausea in the future, as well as allow your body time to shut down its internal defenses to fight off food, germs, and viruses. (D) This will help to prevent the spread of germs. Germs on your hands can get into your eyes, ears, and nose and make you sick.

A: D
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Q: [header] How to insulate a basement [title] These concrete blocks are usually installed at the time of construction or when the home is undergoing significant renovation. [step] Unless you possess expert masonry skills, leave this kind of basement insulation to a cement mason. [title] Purchase concrete blocks infused with foam insulation. <sep> (A) [step] The two common forms sold are autoclaved aerated concrete (aac) and autoclaved cellular concrete (acc). [title] Most commonly, foam board is installed between an exterior finish such as siding and the exterior wall's studs. (B) [step] Their characteristics could vary widely by brand (having inside houses and apartments) or, of course, by your personal experiences with the wall. [title] Get concrete for the area where the inside houses it, and variously label the concrete blocks. (C) [step] In a conventional house, the available concrete costs 120 by 300 square feet. In a program like yours, the amount of available concrete is drastically reduced. (D) [step] These can be either pre-oiled concrete or heavy bricks. These materials can be purchased at masonry supply stores or at home improvement stores.

A:
A
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