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 feed a snake [title] Purchase mice or rats. [step] In the wild, most snakes eat mice, rats, or other small rodents. These animals meet all of snakes' nutritional needs, so an all-mice or all-rat diet is completely sufficient to keep your snake healthy and happy. <sep> (A) If you have just one snake to feed, you can purchase mice or rats from a local pet store. If you have a large number of snakes, you might consider breeding mice or rats for feeding purposes. (B) Ask your owner to provide you with a well-balanced diet for your snake. [substeps] When purchasing mice, be sure to check the rodent's droppings for traces of mice or rats. (C) Purchasing mice and rats is also a great way to help you determine what foods your snake needs. [substeps] Often, you'll find mice in the meat section of a supermarket or pet store. (D) [substeps] Buy a mouse or rat if your snake seems to like rodents. Rat mice are sold commercially and are often quite healthy.
A:
A