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 find low cost dog training [title] Select a puppy training program. [step] Select this program if your dog is between two and five months old. The socialization skills that will be developed during these programs are name recognition, recalls, how to walk on a leash, and commands, such as sit, down, stay, stand, and leave-it. <sep> (A) Once your dog is conditioned enough, consider specialized training methods for other dogs. [title] Sit, stay, and leave-it takes time to train your dog but it's worth it. (B) [substeps] Sit, stay, and leave-it usually takes longer and your pup will not be able to sit if you force him to stay at a standing position. Do not force your pup to sit because it may keep him from slipping off of your hands onto you. (C) If your dog is young, pick a program that teaches older dogs : [substeps] Obedience training also refers to the ability to consistently follow commands in return. This means that when your dog is trained, it associates the command command with positive reinforcement. (D) In addition to socialization, these programs will also cover house-breaking, chewing, biting, digging, and barking. [substeps] You will need to attend these classes with your puppy.
A:
D