Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to teach your dog to do a high five [title] Find a quiet place to train your dog. [step] You will want to find an area to work with your dog that is as free from distractions as possible. By removing your dog from a noisy or busy location, you can help it to focus and learn how to high-five quickly.

Ending1: [substeps] Never train your dog for more than fifteen minutes at a time. This can cause your dog to become frustrated and hinder training efforts. Ending2: The best place will be a quiet space where it will not affect your dog's ability to focus and learn how to stay on task. [substeps] Have a mirror nearby where you have excellent view of your dog. Ending3: [substeps] A quiet, peaceful space is ideal, as you do not need to worry about your dog being distracted by the possibility of clicking under or around someone walking by. [title] Extend your training session to 10 minutes. Ending4: [substeps] Consider asking someone to help you train your dog. If you are playing fetch, for example, you can teach your dog to sit.

Answer format: ending1/ending2/ending3/ending4