Please choose the correct ending to complete the given sentence: Walking the dog: A cat pulls a dog on a leash. The dog follows the cat pulling it on the leash. the cat

Ending1: pulls the dog up stairs on the leash. Ending2: stands on the mouth of the leash while a man ties it's mouth with a piece of tape. Ending3: sits next to a small white christmas tree. Ending4: stops right in front of a brick wall.

Answer format: ending1/ending2/ending3/ending4