Given the task definition and input, reply with output. 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 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.
C