Definition: 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".
Input: [header] How to keep a betta fish alive for 4 years [title] Choose your betta carefully. [step] Try supporting local businesses that take good care of their fish instead of big chain pet stores. Local pet store and online bettas usually have better genetics than the ones that come from the fish farms that supply pet store chains. <sep> (A) Genes play a large role in betta health. Young bettas are brightly colored and have long, flowing tails; as they get older, their colors dull. (B) If you live in the area, you could offer to help with some of the same but smaller purchases. If you can, find a place near you where you can get fish in your own home. (C) Instead, buy a popular, high quality freshwater fish. Large chain pet stores, like croatocross and craigslist, will generally have the best options. (D) [substeps] Do not buy betta fish that stay around larger chains, such as chain fish farms or buyers from towns like this. This is especially important if your shop is near an airport.
Output:
A