Please choose the correct ending to complete the given sentence: Brushing teeth: She sits down on the floor and begins to alternate between brushing her own teeth and brushing the dog's teeth. when she

Ending1: 's done the dog stretches and performs various tricks in a way he doesn't really like. Ending2: finishes, the dog walks across the hardwood floor as she helps clean and groom his teeth. Ending3: 's finished, the dog walks around her holding onto her legs. Ending4: is done she waves to the camera and the video ends.

Answer format: ending1/ending2/ending3/ending4