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 have healthy kidneys [title] Stay hydrated. [step] Staying properly hydrated is one of the best ways to keep your kidneys healthy. Without adequate water, your kidneys can lose some of their ability to filter your blood, and may even become damaged over the course of your lifetime. <sep> (A) [substeps] Drinking water helps your kidneys flush sodium, urea, toxins, and waste out of your body. By staying properly hydrated, you can significantly reduce your risk of developing chronic kidney disease. (B) Aim to drink at least 8 fluid ounces of water every day. This will help reduce any additional fluid or waste in your system and will also allow you to more easily relieve the symptoms of kidney problems. (C) Insufficient water will contribute to poor kidney function, such as kidney failure and rheumatoid arthritis. Trying to drink water with no filter might cause further kidney damage. (D) [substeps] The best amount of water recommended by experts is 1 gallon a day (2.5 liters) each. Drink bottled water, but you don't need soda, fruit juices, or other non-carbonated beverages; opt for bottled water.
[EX A]: A

[EX Q]: [header] How to play sepak takraw [title] Set up the court. [step] The court is rectangular and measures 13. 4 meters by 6.1 meters, approximately the same size as a badminton court. The net is in the middle of the court and should be 1.52 m high. <sep> (A) [substeps] The court runs on one side of the lower part of the court. It is normally used between three or four rows, to remove knee-guards and to protect the entire court from any further slugs (skeletons or other animals). (B) On the inside of the court, you'll see rows and rows and elevated 18 x 19 meters by testing a platform. If you don't expect to play every day, you'll still be able to play as much as you want. (C) A service circle should be drawn 3.05 m from the back line and 2.45 m from the sidelines. The radius of the service circle should be 0.3 m. (D) You should place your face-plates face down on each side of the court, like you are a goldfish. You can also drop your finger or both of your hands on the court's edge and play.
[EX A]: C

[EX Q]: [header] How to do exercises that enhance good posture [title] Try the mountain pose. [step] Even though it looks like you aren't doing much, this exercise is very helpful in improving posture and balance. [substeps] First, stand with your feet together and your arms at your sides press your weight evenly across the balls and arches of your feet make sure you are taking deep breaths and focusing on the present. <sep> (A) Then keeping your face tilted slightly forward press the weight of the weight of your body towards your toes. The mountain pose may sound challenging at first so try to make it fun and easy to do. (B) Raise your shoulders until your arms are completely straight, hold that position for 15 seconds, then lower your shoulders to the ground. Do three to five sets of 10 to 15 reps each. (C) Then, release all your breath and squeeze it hard through your nose. Do 10 to 15 repetitions of this exercise for 30-40 breaths. (D) Hold this position for 10 to 30 seconds [title] Do the kneeling shoulder opener. [step] This is a yoga exercise focused on stretching your upper back muscles.
[EX A]:
D