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 get the right stuff for your new puppy [title] Get a leash and collar. [step] Not all puppies wear collars when they're with their breeders, so it's important to get your puppy used to wearing a collar. Leash training should be done in a fun environment, as early as possible to get your pet comfortable going on walks. <sep> (A) [substeps] Give your puppy access to a leash at all times, even when it's in a confined space. Long periods of leash use will slow your puppy down considerably, so [title] Address your puppy's shyness. (B) Consult a dog toy store or online for a reliable collar, and attach two white wires. [substeps] They can easily be purchased at local pet stores, but usually brand new, are best if used throughout the day. (C) [substeps] If your puppy is young, introduce him to someone who speaks to him. The leash will help him get used to the sounds and movements of other dogs, so you can start training your puppy while it is fully grown. (D) [substeps] Don't pull your puppy about! Instead, put it on the leash and follow it. Encourage it to go your direction if needed, but don't drag it along.
A:
D