Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to teach your dog to focus [title] Choose the right setting. [step] When you begin training your dog to focus, you want to start in a place with as few distractions as possible. Find a place that is quiet, where you can control the circumstances during training.

Ending1: [substeps] An indoor space in your house may be ideal. Turn off devices such as phones and televisions. Ending2: [substeps] You should also avoid a location that is getting too loud or busy. Loud noises can definitely pack a punch, and having a place you can supervise your dog while it absorbs all of the noise will help you gain control of the situation. Ending3: [substeps] Be mindful of your dog's environment. You will want to pick a place with bright lights and relatively minimal traffic. Ending4: [substeps] As another example, you might choose a spot outside in the sun, or if you want to take your dog outside to practice a new skill, you might try the beach. Your dog may not be used to the sand yet.

Answer format: ending1/ending2/ending3/ending4