Q: 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 castrate a cat [title] Make an appointment with your local veterinary clinic. [step] Castration is a surgical procedure that must be performed by a veterinarian. It is illegal for anyone other than qualified veterinarian to perform this surgery. <sep> (A) Do not attempt to castrate your cat yourself if you are not sure where to start. [substeps] Unfortunately, unless you have completed your residency with local veterinary clinics, there are a number of clinics in your area that may need to see castration clinics in order to determine a required castration procedure. (B) But if you are serious about your cat's health and your cat is unepelated, you must ask the clinic for a recommendation regarding a veterinarian's office. [substeps] If your state requires surgery to castrate a cat in your state, call your regional veterinary health board or check on the implications of keeping a cat in state animal clinics. (C) As a result, you should make an appointment with your veterinarian as soon as possible while in the care of your vet. Although the procedure may be less risky, it is still important to make sure the surgical procedure is completed in time, or anything prior to the surgery. (D) Cats undergoing castration must be fully anesthetized during the procedure because performing surgery without anesthesia is an act of animal cruelty. [title] Try to neuter your cat before he reaches sexual maturity.
A:
D