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".

[header] How to perform hip flexor stretches [title] Do a yoga camel pose. [step] In addition to stretching the hip flexors, the camel pose will open up the chest and increase the flexibility of the spine. The exercise tightens the waist and strengthens the arms and shoulders as well. <sep> (A) Yogis believe that this posture opens up your respiratory system so that you can take in more oxygen with each breath. They also believe that the exercise helps to open the heart chakra to allow you to feel more connected to the world and to bestow forgiveness where needed in your life. (B) Give yourself a break from the chair and let your head and neck rest against the top of your bar. [substeps] If you're feeling a little fatigued or fatigued, wait a few minutes to give your body time to rest. (C) To do a camel pose, lie down on the floor with your back straight and your feet placed on a park bench. Grip the bars with the weights in your hands. (D) Before attempting these poses, they should be done at home : [substeps] Kneel with your knees bent at a 90 degree angle. Put both of your feet together with your toes pointed in towards each other.
A

[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.
D

[header] How to diagnose hamster dental problems [title] Look for signs your hamster isn't eating. [step] Overgrown teeth make it difficult for the hamster to eat. This is because the long teeth force the jaws permanently apart, the long teeth grow into the roof of the mouth or pierce the lips, or the teeth develop sharp jagged edges that make eating painful. <sep> (A) For example, look for overgrown teeth starting from the rear or front row of teeth. [substeps] The teeth grow outward from the front row, sometimes going past the incisors. (B) [substeps] If your hamster's food is not disappearing like it usually does, then it may not be eating due to dental problems. [title] Don't assume food that disappears has been eaten. (C) [substeps] Large, overgrown teeth give your hamster a toothache. The teeth have grown out of the head and will disappear any time the hamster eats the food. (D) [substeps] Plaque production around this part of the mouth can also cause dental problems. So, your hamster might eat litter, sticky or waxy cat litter, poop, or even human food.
B