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 treat ingrown eyelids in dogs [title] Look for squinting. [step] Squinting is an easily recognized sign of eye irritation. Your dog may squint if it feels like there's something in the eye that it can't get out. <sep> (A) In this case, the ingrown eyelid is causing the eyelashes to rub directly against the eye. If you can't tell if your dog is squinting, compare the size of your dog's irritated eye to the other one. (B) This is not always an indication of eye irritation. It's often the case that tears will build up within the eyelids, which can cause the eyes to appear unfocused and dry. (C) It may also display its eyelids twitching or blinking repeatedly. Some dog owners find it embarrassing to have their dog squint because of its inability to see. (D) Visit your vet if you notice : [substeps] Squinting irritation blockage of the eye. This is the case with retinitis, which causes squinting.
[A]: A


[Q]: [header] How to avoid water retention [title] Have a healthy diet. [step] Ensuring you have a healthy, balanced diet is a good first step to avoid water retention. Water retention can occur due to imbalances in your diet, deficiencies of some vitamins and minerals, and having too much salt. <sep> (A) One study found that people with excess salt = no water retention. " imbalance " can add up as a reason for water retention and include making it much more difficult to stay hydrated. (B) Excess salt raises your blood pressure, resulting in inaccurate results. Look for foods that are low in salt and low in water. (C) Eating a balanced diet will help to reduce the chances of water retention occurring due to these issues. [title] Eat food that is rich in potassium. (D) [substeps] If you have recently cooked or baked a meal, make an effort to change your recipe one day. This can help your body prevent the retention.
[A]: C


[Q]: [header] How to administer insulin to a cat [title] Follow the storage instructions on the label. [step] Your insulin will come with detailed directions on proper storage and handling. Make sure to familiarize yourself with these directions, and ask your vet if you have any questions. <sep> (A) [title] Retrieve an insulin syringe from the can and administer the insulin. [step] While the type of insulin injection for most cats will be restricted by diseases, most veterinarians recommend using a syringe. (B) [substeps] The battery is usually stored in the tray. If your cat does not have one, then there is a chance he already has an insulin canister. (C) [title] Refrigerate your insulin until you are ready to use it. [step] Insulin will deteriorate and become ineffective if it is exposed to heat. (D) [substeps] You can have an adult pick your cat up and feed it the insulin, or you can keep it on its own. [title] Provide sufficient insulin to maintain the cat's health.
[A]:
C