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 help a cat not throw up [title] Check when your cat was last dewormed. [step] An infestation of worms, such as tapeworms, can cause your cat to vomit. By deworming your cat, you will be able to either stop the vomiting from occurring, or at least rule out this as a cause. <sep> (A) [substeps] In the first year, you should only have one infestation. Your cat should be dewormed each month, as tapeworms spread to other foods. (B) [substeps] Have your cat dewormed once a year as well. [title] Check for worm marks after the time of deworming. (C) [substeps] In the case of tapeworms, your cat may make a feeding habit of licking the worms. This behavior is especially common if the worms have been coming in from a recently-dewormed cat. (D) [substeps] Deworm your cat more often-once a month at minimum-if they are allowed to hunt. If your cat is behind on their deworming, get them up to date.
A:
D