You will be given a definition of a task first, then some input of the task.
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 treat excessive flatulence in cats [title] Monitor what your cat eats for a day or two. [step] To figure out if the problem is related to the food, you should keep a record of your cat's food and eating habits for a day or two. This can give you a complete view of their foods so you can figure out what is causing the gas. <sep> (A) You may then include this information in your cat's diet if they start to show the problem. Be careful if you are administering this method because it may be harmful. (B) [substeps] Make sure not to change anything for a day or two so you can try to get an accurate idea of the causes. [title] Check your cat's feces. (C) If your cat is not eating meals normally, then maybe the issue is with their allergies. [substeps] Visit the vet to make sure the problem is something you can fix but keep it between the two of you. (D) [substeps] Maybe your cat prefers to sit outside but is unable to eat as usual. If this is the case, then keep track of your cat's behavior since it might be affected by the gas.
Output:
B