Write the next sentence in the following story.

Two dogs wearing clothing run together up stairs. The two dogs are shown running together amidst crowds in several different locations while following a man. the man

OPTIONS: [-] is then seen cutting his hair as well as shaving his head.; [-] teaches one dog to pull another by the leash.; [-] is instructing them, until rottweilers come in the background and run on the man's shoulders.; [-] then picks up tiles and puts them down in an indoor gymnastic arena.;. The answer should be
teaches one dog to pull another by the leash.