Please choose the correct ending to complete the given sentence: Walking the dog: Black dog is walking in a treadmill in a white room. dog

Ending1: is running in the treadmill that is next to a drawer. Ending2: is running through water in a z between sinks doing exercise in a small bath tub. Ending3: is wiping its mouth and standing on a table deep in pain. Ending4: is plates in a table and a person is pulling the plates out.

Answer format: ending1/ending2/ending3/ending4