Please choose the correct ending to complete the given sentence: Polishing shoes: A can of black shoe polish is shown. a man

Ending1: uses the can to rub the shoe step clean. Ending2: fills up a can with kerosene. Ending3: brushes a man's nose and removes a stud. Ending4: is using a cloth to polish a black shoe.

Answer format: ending1/ending2/ending3/ending4