Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to train a therapy dog [title] Socialize your dog with a variety of people. [step] For a dog to become a great therapy dog, it should have early and consistent socialization. It should be exposed to people in a wide variety of locations starting at an early age.

Ending1: This will help it get used to the wide variety of people and places it will visit as a therapy dog. [substeps] Make sure your dog is meeting people of different sizes, ages, genders, and ethnicities. Ending2: If you have a dog as an adult, you may want to introduce it to people through a social network so it can gain social support and see lots of people. Keep this in mind as you decide if you want your dog to socialize with visitors. Ending3: In order to accommodate this, even a small dog can be trained to socialize with a variety of people. On one hand, with a physical degree of exposure, a dog can quickly familiarize itself with a wide variety of people. Ending4: [substeps] Choose someone in your home with whom to socialize your dog. Choose a family dog, a puppy, or another dog that you trust.

Answer format: ending1/ending2/ending3/ending4