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". 

[EX Q]: [header] How to choose a secondhand engagement ring [title] Visit a respected local jeweler. [step] Some jewelry stores carry a selection of secondhand or vintage engagement rings. Research local jewelers to find a trustworthy shop in your area. <sep> (A) Use the store's contacts to carefully inspect the rings and design design, but ask the jeweler if there are any indication that they intend to sell them. [title] Ask friends or family members who have similar ring engagement rings. (B) Alternately, ask your friend or family representative if they know of any reputable appraisers in their area. [substeps] Different shops will be exclusive, so ensure that the jeweler you seek matches your ring to that of your friend or family member. (C) [title] Look for a good price and type of ring you want. [step] Don't be picky when choosing online. (D) Consider how long the business has been open and ask friends or family if they are familiar with the business. A reputable jeweler will typically have an in-house gemologist and repair and resizing services.
[EX A]: D

[EX Q]: More shots are shown of a website as well as the outside of the shop while the men continue to speak. more people <sep> (A) then arrive to take pictures and a bored man is unable to participate. (B) are shown drinking coffee as well as sit in front of their computer talking and participating in the board as well as meeting with one another and riding in a raft. (C) are seen getting tattoos while the men still speak to the camera. (D) are then seen controlling a large group of horses and leading them around a very large gate as well as running underneath it and bumping into the fences.
[EX A]: C

[EX Q]: [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.
[EX A]:
B