Detailed Instructions: 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 put your cat on a limited ingredient diet [title] Talk with your vet. [step] A limited ingredient diet has ingredients to which your cat is not allergic. For cats, this diet typically contains a novel protein, which is a protein your cat has not eaten before. <sep> (A) Examples of potentially novel proteins are venison (deer) and kangaroo meat. When you talk with your vet, tell them the protein source in each food you have fed your cat. (B) Your vet can tell you whether the recommended amounts of this protein are beneficial to your cat. [substeps] If you are unsure, also consider the ingredients mentioned below. (C) The protein source has to be traditional protein sources like steel, chicken, and a wide variety of foods. Watch which amino acids your cat seems to react to more often. (D) Your vet can recommend a dosage based on the type of protein your cat likes to eat. [substeps] If your cat has an allergy to the protein you feed them, bring it to their veterinarian.
A:
A